diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0037edf..f60dc45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+## 1.9.31
+
+- Bug fixes:
+  - `ConditionSQLEncoder.valueToParameterValue`: fixed encoding of a `List` of values containing `ConditionParameter`s; each element is now resolved individually instead of passing the whole list to every element.
+  - `ConditionEncoder.resolveValueToType`: fixed resolution of a single-element `Iterable` to a primitive type (was a no-op comparison instead of an assignment, leaving the value as a `List`).
+  - `MapGetterExtension.matchKeyIgnoreCase`: fixed case-insensitive key matching that always returned `null` (empty loop body); now returns the matching key. Also fixes `setMultiValue(..., ignoreCase: true)`.
+  - `Time`: `millisecond`/`microsecond` range validation now correctly rejects `1000` (valid range is `0..999`).
+  - `Time._bytesInStringFormat`: fixed the second-byte digit check that was effectively disabled (`length < 2` instead of `length >= 2`).
+  - `APISession.isExpired`: now honors the provided `now` argument instead of always using `DateTime.now()`.
+  - `APIServerResponseCache` cached entry: `replaceFileStat` no longer compares a variable to itself (`identical(myFileStat, myFileStat)`), so the file stat is correctly replaced.
+  - `WeakList.set`: now increments the internal modification counter, consistent with the other mutating methods.
+
+- Tests:
+  - Added tests covering the bug fixes above (`Time` range/string parsing, `matchKeyIgnoreCase`/`getIgnoreCase`/`setMultiValue`, `APISession.isExpired`, and `ConditionSQLEncoder`/`ConditionEncoder` value resolution).
+
 ## 1.9.30
 
 - `APIRootStarter`:
diff --git a/lib/src/bones_api_base.dart b/lib/src/bones_api_base.dart
index 576447a..de2336e 100644
--- a/lib/src/bones_api_base.dart
+++ b/lib/src/bones_api_base.dart
@@ -48,7 +48,7 @@ typedef APILogger =
 /// Bones API Library class.
 class BonesAPI {
   // ignore: constant_identifier_names
-  static const String VERSION = '1.9.30';
+  static const String VERSION = '1.9.31';
 
   static bool _boot = false;
 
diff --git a/lib/src/bones_api_condition_encoder.dart b/lib/src/bones_api_condition_encoder.dart
index a8047a5..25f42c0 100644
--- a/lib/src/bones_api_condition_encoder.dart
+++ b/lib/src/bones_api_condition_encoder.dart
@@ -1543,7 +1543,7 @@ abstract class ConditionEncoder {
         if (listLength == 0) {
           return null;
         } else if (listLength == 1) {
-          value == list.first;
+          value = list.first;
         } else {
           throw ArgumentError(
             "Can't resolve a `List` with mutiple values to a primitive type: $valueTypeInfo >> $value",
@@ -1551,6 +1551,8 @@ abstract class ConditionEncoder {
         }
       }
 
+      if (value == null) return null;
+
       var parsedValue = valueParser(value);
       if (parsedValue != null) {
         return parsedValue;
diff --git a/lib/src/bones_api_condition_sql.dart b/lib/src/bones_api_condition_sql.dart
index 6fe2c4b..1c4414e 100644
--- a/lib/src/bones_api_condition_sql.dart
+++ b/lib/src/bones_api_condition_sql.dart
@@ -633,7 +633,7 @@ class ConditionSQLEncoder extends ConditionEncoder {
           value.map((v) {
             if (v is ConditionParameter) {
               return conditionParameterToParameterValue(
-                value,
+                v,
                 context,
                 fieldKey,
                 fieldType,
@@ -641,7 +641,7 @@ class ConditionSQLEncoder extends ConditionEncoder {
               );
             } else {
               return _valueToParameterValueImpl(
-                value,
+                v,
                 fieldType,
                 key: fieldKey,
                 valueAsList: valueAsList,
diff --git a/lib/src/bones_api_extension.dart b/lib/src/bones_api_extension.dart
index 304a70c..16de970 100644
--- a/lib/src/bones_api_extension.dart
+++ b/lib/src/bones_api_extension.dart
@@ -248,7 +248,9 @@ extension MapGetterExtension<K, V> on Map<K, V> {
     var keyStr = key.toString();
 
     for (var k in keys) {
-      if (equalsIgnoreAsciiCase(keyStr, k.toString())) {}
+      if (equalsIgnoreAsciiCase(keyStr, k.toString())) {
+        return k;
+      }
     }
 
     return null;
diff --git a/lib/src/bones_api_server_cache.dart b/lib/src/bones_api_server_cache.dart
index 6a2299f..a113b85 100644
--- a/lib/src/bones_api_server_cache.dart
+++ b/lib/src/bones_api_server_cache.dart
@@ -834,7 +834,7 @@ abstract class _CachedResponse
     if (fileStat == null) return;
 
     var myFileStat = _fileStat;
-    if (identical(myFileStat, myFileStat)) return;
+    if (identical(myFileStat, fileStat)) return;
 
     if (myFileStat == null || myFileStat.file == fileStat.file) {
       fileStat.updateFrom(myFileStat);
diff --git a/lib/src/bones_api_session.dart b/lib/src/bones_api_session.dart
index 3d0c5ad..fbc43a9 100644
--- a/lib/src/bones_api_session.dart
+++ b/lib/src/bones_api_session.dart
@@ -66,7 +66,7 @@ class APISession {
   bool isExpired(Duration timeout, {DateTime? now}) {
     now ??= DateTime.now();
 
-    var elapsedTime = lastAccessElapsedTime;
+    var elapsedTime = now.difference(lastAccessTime);
     return elapsedTime.compareTo(timeout) > 0;
   }
 
diff --git a/lib/src/bones_api_test_utils_freeport.dart b/lib/src/bones_api_test_utils_freeport.dart
index 5d7e669..ec19918 100644
--- a/lib/src/bones_api_test_utils_freeport.dart
+++ b/lib/src/bones_api_test_utils_freeport.dart
@@ -5,7 +5,6 @@ import 'package:docker_commander/docker_commander_vm.dart';
 
 final Set<int> _initFreePorts = <int>{};
 
-@override
 Future<int> resolveFreePort(int port) {
   var startPort = port - 100;
   var endPort = port + 100;
diff --git a/lib/src/bones_api_types.dart b/lib/src/bones_api_types.dart
index 4a2d4a8..a8809bf 100644
--- a/lib/src/bones_api_types.dart
+++ b/lib/src/bones_api_types.dart
@@ -43,7 +43,7 @@ class Time implements Comparable<Time> {
       throw ArgumentError.value(second, 'second', 'Not in range: 0..59');
     }
 
-    if (millisecond < 0 || millisecond > 1000) {
+    if (millisecond < 0 || millisecond > 999) {
       throw ArgumentError.value(
         millisecond,
         'millisecond',
@@ -51,7 +51,7 @@ class Time implements Comparable<Time> {
       );
     }
 
-    if (microsecond < 0 || microsecond > 1000) {
+    if (microsecond < 0 || microsecond > 999) {
       throw ArgumentError.value(
         microsecond,
         'microsecond',
@@ -122,7 +122,7 @@ class Time implements Comparable<Time> {
     if (value.isEmpty) return false;
 
     if (!_isDigitByte(value[0])) return false;
-    if (value.length < 2 && !_isDigitByte(value[1])) return false;
+    if (value.length >= 2 && !_isDigitByte(value[1])) return false;
 
     if (value.length == 8 &&
         value[2] == _charColon &&
diff --git a/lib/src/bones_api_utils_weaklist.dart b/lib/src/bones_api_utils_weaklist.dart
index e139dcf..4c9833c 100644
--- a/lib/src/bones_api_utils_weaklist.dart
+++ b/lib/src/bones_api_utils_weaklist.dart
@@ -99,6 +99,8 @@ class WeakList<E extends Object> extends ListBase<E?> {
       _entries[index] = WeakReference(value);
     }
 
+    ++_modCount;
+
     return prevWeakRef.target;
   }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index d52d356..b06f3f6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: bones_api
 description: Bones_API - A powerful API backend framework for Dart. It comes with a built-in HTTP Server, route handler, entity handler, SQL translator, and DB adapters.
-version: 1.9.30
+version: 1.9.31
 homepage: https://github.com/Colossus-Services/bones_api
 
 environment:
diff --git a/test/bones_api_condition_test.dart b/test/bones_api_condition_test.dart
index 676e210..2ac742e 100644
--- a/test/bones_api_condition_test.dart
+++ b/test/bones_api_condition_test.dart
@@ -497,6 +497,48 @@ void main() {
           TableFieldReference('account', 'address', int, 'address', 'id', int),
         });
       }
+
+      {
+        // An `IN` list mixing a `ConditionParameter` and a literal value.
+        // Each element must be encoded individually (not the whole list).
+        var cond = KeyConditionIN(
+          [ConditionKeyField('id')],
+          [ConditionParameter.key('a'), 99],
+        );
+
+        var sql = await sqlEncoder.encode(
+          cond,
+          'account',
+          parameters: {'a': 7},
+        );
+
+        expect(
+          sql.outputString,
+          equals('( "ac"."id" IN ( ( @a__0 ) , ( 99 ) ) )'),
+        );
+        expect(sql.parametersPlaceholders, equals({'a__0': 7}));
+      }
+    });
+
+    test('resolveValueToType single-element list', () async {
+      var enc = ConditionSQLEncoder(
+        _TestSchemeProvider(),
+        sqlElementQuote: '"',
+      );
+
+      // A single-element `Iterable` must be resolved to its element when the
+      // target type is a primitive:
+      expect(await enc.resolveValueToType([42], int), equals(42));
+      expect(await enc.resolveValueToType(['abc'], String), equals('abc'));
+
+      // An empty `Iterable` resolves to `null`:
+      expect(await enc.resolveValueToType([], int), isNull);
+
+      // A plain value is resolved as-is:
+      expect(await enc.resolveValueToType(7, int), equals(7));
+
+      // A multi-element list can't be resolved to a primitive:
+      expect(() => enc.resolveValueToType([1, 2], int), throwsArgumentError);
     });
   });
 
diff --git a/test/bones_api_session_test.dart b/test/bones_api_session_test.dart
index c05c1da..94f4696 100644
--- a/test/bones_api_session_test.dart
+++ b/test/bones_api_session_test.dart
@@ -7,6 +7,30 @@ import 'package:shared_map/shared_map.dart';
 import 'package:test/test.dart';
 
 void main() {
+  group('APISession', () {
+    test('isExpired uses provided `now`', () async {
+      var session = APISession('s1');
+
+      var lastAccess = session.lastAccessTime;
+      var timeout = Duration(seconds: 10);
+
+      // Within the timeout window:
+      expect(
+        session.isExpired(timeout, now: lastAccess.add(Duration(seconds: 5))),
+        isFalse,
+      );
+      // Exactly at the timeout (elapsed == timeout is NOT expired):
+      expect(session.isExpired(timeout, now: lastAccess.add(timeout)), isFalse);
+      // Past the timeout window:
+      expect(
+        session.isExpired(timeout, now: lastAccess.add(Duration(seconds: 11))),
+        isTrue,
+      );
+      // A `now` before/at the last access is never expired:
+      expect(session.isExpired(timeout, now: lastAccess), isFalse);
+    });
+  });
+
   group('APISessionSet', () {
     final sharedStoreRef = SharedStore("t1").sharedReference();
 
diff --git a/test/bones_api_types_test.dart b/test/bones_api_types_test.dart
index bb61e35..bb093f9 100644
--- a/test/bones_api_types_test.dart
+++ b/test/bones_api_types_test.dart
@@ -267,6 +267,37 @@ void main() {
       );
     });
 
+    test('range validation', () async {
+      // Valid boundaries:
+      expect(Time(0, 0, 0, 0, 0).toString(), equals('00:00:00'));
+      expect(Time(23, 59, 59, 999, 999).toString(), equals('23:59:59.999999'));
+
+      // millisecond/microsecond must be in range 0..999 (1000 is invalid):
+      expect(() => Time(0, 0, 0, 1000), throwsArgumentError);
+      expect(() => Time(0, 0, 0, -1), throwsArgumentError);
+      expect(() => Time(0, 0, 0, 0, 1000), throwsArgumentError);
+      expect(() => Time(0, 0, 0, 0, -1), throwsArgumentError);
+
+      expect(() => Time(0, 60), throwsArgumentError);
+      expect(() => Time(0, 0, 60), throwsArgumentError);
+    });
+
+    test('fromBytes string format', () async {
+      // 8-byte ASCII string "20:11:31" must be parsed as a string, not as
+      // binary-encoded microseconds:
+      expect(Time.fromBytes('20:11:31'.codeUnits), equals(Time(20, 11, 31)));
+
+      expect(
+        Time.fromBytes('20:11:31.123'.codeUnits),
+        equals(Time(20, 11, 31, 123)),
+      );
+
+      expect(
+        Time.fromBytes('20:11:31.123456'.codeUnits),
+        equals(Time(20, 11, 31, 123, 456)),
+      );
+    });
+
     test('(all combinations 32-bits)', () async {
       for (var h = 0; h <= 23; ++h) {
         for (var m = 0; m <= 59; ++m) {
diff --git a/test/bones_api_utils_test.dart b/test/bones_api_utils_test.dart
index a44db3c..7af12be 100644
--- a/test/bones_api_utils_test.dart
+++ b/test/bones_api_utils_test.dart
@@ -766,6 +766,41 @@ void main() {
       );
     });
   });
+
+  group('MapGetterExtension', () {
+    test('matchKeyIgnoreCase', () async {
+      var map = {'Foo': 1, 'BAR': 2};
+
+      // Exact match:
+      expect(map.matchKeyIgnoreCase('Foo'), equals('Foo'));
+      // Case-insensitive match should return the ORIGINAL key:
+      expect(map.matchKeyIgnoreCase('foo'), equals('Foo'));
+      expect(map.matchKeyIgnoreCase('FOO'), equals('Foo'));
+      expect(map.matchKeyIgnoreCase('bar'), equals('BAR'));
+      expect(map.matchKeyIgnoreCase('Bar'), equals('BAR'));
+      // No match:
+      expect(map.matchKeyIgnoreCase('baz'), isNull);
+    });
+
+    test('getIgnoreCase', () async {
+      var map = {'Foo': 1, 'BAR': 2};
+
+      expect(map.getIgnoreCase('foo'), equals(1));
+      expect(map.getIgnoreCase('bar'), equals(2));
+      expect(map.getIgnoreCase('baz'), isNull);
+      expect(map.getIgnoreCase('baz', defaultValue: -1), equals(-1));
+    });
+
+    test('setMultiValue ignoreCase', () async {
+      var map = <String, Object>{'Foo': 'a'};
+
+      map.setMultiValue('foo', 'b', ignoreCase: true);
+
+      // Should accumulate into the existing (original-case) key, not create a new one:
+      expect(map.keys.toList(), equals(['Foo']));
+      expect(map['Foo'], equals(['a', 'b']));
+    });
+  });
 }
 
 Future<T> _asyncValue<T>(T value) =>