diff --git a/common/changes/@hcengineering/core/fix-clone_2026-01-13-06-37.json b/common/changes/@hcengineering/core/fix-clone_2026-01-13-06-37.json
new file mode 100644
index 0000000..67e1fa4
--- /dev/null
+++ b/common/changes/@hcengineering/core/fix-clone_2026-01-13-06-37.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@hcengineering/core",
+      "comment": "Fix object clone",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@hcengineering/core"
+}
\ No newline at end of file
diff --git a/packages/core/package.json b/packages/core/package.json
index 0a0c73f..5b4fa2a 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hcengineering/core",
-  "version": "0.7.24",
+  "version": "0.7.25",
   "main": "lib/index.js",
   "svelte": "src/index.ts",
   "types": "types/index.d.ts",
diff --git a/packages/core/src/clone.ts b/packages/core/src/clone.ts
index 060a7e5..b3850e2 100644
--- a/packages/core/src/clone.ts
+++ b/packages/core/src/clone.ts
@@ -14,7 +14,14 @@ export function getTypeOf (obj: any): string {
     return 'Array'
   }
 
-  const stringTag = ste && obj[Symbol.toStringTag]
+  let stringTag: string | undefined
+  if (ste) {
+    try {
+      stringTag = obj[Symbol.toStringTag]
+    } catch {
+      stringTag = undefined
+    }
+  }
   if (typeof stringTag === 'string') {
     return stringTag
   }