diff --git a/README.md b/README.md
index f45433c6..2baef35d 100644
--- a/README.md
+++ b/README.md
@@ -964,6 +964,7 @@ for (const accountComment of accountComments) {
   console.log("comment", accountComment.index, "is status", accountComment.state);
 }
 // `state` becomes `failed` as soon as a pending local publish records terminal failure (`publishingState === "failed"` and `state === "stopped"`) or a publish error, instead of waiting for the 20-minute fallback.
+// local account comments returned by useAccountComment and useAccountComments include the account author's address and shortAddress when an older cached account comment is missing author identity fields.
 // note: accountComment.index can change after deletions; prefer commentCid for stable identifiers
 
 // all my own votes
diff --git a/llms-full.txt b/llms-full.txt
index 2dd796ea..e96541ad 100644
--- a/llms-full.txt
+++ b/llms-full.txt
@@ -994,6 +994,7 @@ for (const accountComment of accountComments) {
   console.log("comment", accountComment.index, "is status", accountComment.state);
 }
 // `state` becomes `failed` as soon as a pending local publish records terminal failure (`publishingState === "failed"` and `state === "stopped"`) or a publish error, instead of waiting for the 20-minute fallback.
+// local account comments returned by useAccountComment and useAccountComments include the account author's address and shortAddress when an older cached account comment is missing author identity fields.
 // note: accountComment.index can change after deletions; prefer commentCid for stable identifiers
 
 // all my own votes
@@ -3163,6 +3164,19 @@ Avoid GitHub MCP and browser MCP servers for this project because they add signi
 Source: https://github.com/bitsocialnet/bitsocial-react-hooks/blob/master/CHANGELOG.md
 
 ```markdown
+## [0.1.19](https://github.com/bitsocialnet/bitsocial-react-hooks/compare/v0.1.18...v0.1.19) (2026-06-18)
+
+
+### Bug Fixes
+
+* resolve community name lookups ([ffef83c](https://github.com/bitsocialnet/bitsocial-react-hooks/commit/ffef83cc7b27a59fca4b0788732ff0bfc213496e))
+
+
+
+## [0.1.18](https://github.com/bitsocialnet/bitsocial-react-hooks/compare/v0.1.17...v0.1.18) (2026-06-15)
+
+
+
 ## [0.1.17](https://github.com/bitsocialnet/bitsocial-react-hooks/compare/v0.1.16...v0.1.17) (2026-06-12)
 
 
diff --git a/llms.txt b/llms.txt
index 0e509194..6fa50335 100644
--- a/llms.txt
+++ b/llms.txt
@@ -38,5 +38,5 @@ This file is generated by `scripts/generate-llms-files.mjs`. Do not hand-edit it
 
 ## Optional
 
-- [Changelog](https://github.com/bitsocialnet/bitsocial-react-hooks/blob/master/CHANGELOG.md): * **actions:** adapt challenge answers for pkc-js ([20d89f0](https://github.com/bitsocialnet/bitsocial-react-hooks/commit/20d89f07363f54c38b83e0f9425bd77174854f9f)) * **deps:** upgrade pkc-js and kubo ([9cb56c2](https...
+- [Changelog](https://github.com/bitsocialnet/bitsocial-react-hooks/blob/master/CHANGELOG.md): * resolve community name lookups ([ffef83c](https://github.com/bitsocialnet/bitsocial-react-hooks/commit/ffef83cc7b27a59fca4b0788732ff0bfc213496e))
 - [TODO](https://github.com/bitsocialnet/bitsocial-react-hooks/blob/master/docs/TODO.md): - e2e test to publish to an electron sub - async useAuthorAddress hook (because resolving ETH address synchronously is too slow) - implement sort by active - implement showing your own pending replies in a comment (wh...
diff --git a/package.json b/package.json
index aac9292f..3c83b113 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "version": "0.1.19",
+  "version": "0.1.20",
   "packageManager": "yarn@4.13.0",
   "files": [
     "CHANGELOG.md",
diff --git a/src/hooks/accounts/accounts.test.ts b/src/hooks/accounts/accounts.test.ts
index d8cdf161..b67c36aa 100644
--- a/src/hooks/accounts/accounts.test.ts
+++ b/src/hooks/accounts/accounts.test.ts
@@ -1655,6 +1655,75 @@ describe("accounts", () => {
       expect(rendered2.result.current.index).toBe(undefined);
     });
 
+    test("account comment hooks restore missing local author identity from the owning account", async () => {
+      const accountId = accountsStore.getState().activeAccountId!;
+      accountsStore.setState((state: any) => ({
+        ...state,
+        accounts: {
+          ...state.accounts,
+          [accountId]: {
+            ...state.accounts[accountId],
+            author: {
+              ...state.accounts[accountId].author,
+              displayName: "Account Author",
+              avatar: "account-avatar.png",
+              flair: { label: "account flair" },
+            },
+          },
+        },
+        accountsComments: {
+          ...state.accountsComments,
+          [accountId]: state.accountsComments[accountId].map(
+            (accountComment: any, index: number) => {
+              if (index === 0) {
+                return {
+                  ...accountComment,
+                  author: { displayName: "Anonymous", shortAddress: "stale-short-address" },
+                };
+              }
+              if (index === 1) {
+                return {
+                  ...accountComment,
+                  author: { address: "existing author address", displayName: "Existing Author" },
+                };
+              }
+              return accountComment;
+            },
+          ),
+        },
+      }));
+
+      const accountAuthor = accountsStore.getState().accounts[accountId].author;
+      const rendered2 = renderHook(() => {
+        const accountComment = useAccountComment({ commentIndex: 0 });
+        const accountComments = useAccountComments({ commentIndices: [0, 1] });
+        return { accountComment, accountComments };
+      });
+      const waitForRestoredAuthor = testUtils.createWaitFor(rendered2);
+
+      await waitForRestoredAuthor(
+        () => rendered2.result.current.accountComment.author?.address === accountAuthor.address,
+      );
+
+      const restoredComment = rendered2.result.current.accountComment;
+      expect(restoredComment.author.address).toBe(accountAuthor.address);
+      expect(typeof restoredComment.author.shortAddress).toBe("string");
+      expect(restoredComment.author.shortAddress).not.toBe("stale-short-address");
+      expect(restoredComment.author.displayName).toBe("Anonymous");
+      expect(restoredComment.author.avatar).toBe("account-avatar.png");
+      expect(restoredComment.author.flair).toEqual({ label: "account flair" });
+
+      const [restoredListComment, existingAuthorComment] =
+        rendered2.result.current.accountComments.accountComments;
+      expect(restoredListComment.author.address).toBe(accountAuthor.address);
+      expect(restoredListComment.author.displayName).toBe("Anonymous");
+      expect(existingAuthorComment.author.address).toBe("existing author address");
+      expect(existingAuthorComment.author.displayName).toBe("Existing Author");
+      expect(
+        accountsStore.getState().accountsComments[accountId][0].author.address,
+      ).toBeUndefined();
+    });
+
     test(`get all account comments`, async () => {
       expect(rendered.result.current.accountComments.length).toBe(3);
       expect(rendered.result.current.accountComments[0].content).toBe("content 1");
@@ -3927,6 +3996,21 @@ describe("accounts", () => {
       expect(rendered.result.current.errors).toEqual([]);
     });
 
+    test("useAccountComment ignores negative and fractional indexes", async () => {
+      const rendered = renderHook<any, any>((props) => useAccountComment(props));
+      const waitFor = testUtils.createWaitFor(rendered);
+
+      rendered.rerender({ commentIndex: -1 });
+      await waitFor(() => rendered.result.current.state !== undefined);
+      expect(rendered.result.current.content).toBeUndefined();
+      expect(rendered.result.current.errors).toEqual([]);
+
+      rendered.rerender({ commentIndex: 0.5 });
+      await waitFor(() => rendered.result.current.state !== undefined);
+      expect(rendered.result.current.content).toBeUndefined();
+      expect(rendered.result.current.errors).toEqual([]);
+    });
+
     test("useAccountComment with nonexistent account has undefined accountComments", async () => {
       const rendered = renderHook(() =>
         useAccountComment({ commentIndex: 0, accountName: "NonExistentAccount" }),
diff --git a/src/hooks/accounts/accounts.ts b/src/hooks/accounts/accounts.ts
index b72d0f98..fd7ff11d 100644
--- a/src/hooks/accounts/accounts.ts
+++ b/src/hooks/accounts/accounts.ts
@@ -51,6 +51,7 @@ import {
 } from "../../lib/community-address";
 import { addCommentModeration } from "../../lib/utils/comment-moderation";
 import useInterval from "../utils/use-interval";
+import PkcJs from "../../lib/pkc-js";
 
 const getCommentEditPropertyValue = (comment: any, propertyName: string) => {
   if (propertyName !== COMMENT_MODERATION_AUTHOR_SUMMARY_KEY) {
@@ -419,6 +420,35 @@ const getAccountHistorySortType = (
   return order === "desc" ? "new" : "old";
 };
 
+const getAccountCommentWithAccountAuthor = (
+  accountComment: AccountComment,
+  account?: Account,
+  accountId?: string,
+): AccountComment => {
+  const accountAuthor = account?.author;
+  if (
+    !accountId ||
+    accountComment.accountId !== accountId ||
+    !accountAuthor?.address ||
+    accountComment.author?.address
+  ) {
+    return accountComment;
+  }
+
+  const accountShortAddress =
+    accountAuthor.shortAddress || PkcJs.PKC.getShortAddress({ address: accountAuthor.address });
+
+  return {
+    ...accountComment,
+    author: {
+      ...accountAuthor,
+      ...accountComment.author,
+      address: accountAuthor.address,
+      ...(accountShortAddress ? { shortAddress: accountShortAddress } : {}),
+    },
+  };
+};
+
 export function useAccountComments(options?: UseAccountCommentsOptions): UseAccountCommentsResult {
   assert(
     !options || typeof options === "object",
@@ -448,6 +478,7 @@ export function useAccountComments(options?: UseAccountCommentsOptions): UseAcco
   const commentCidToAccountComment = useAccountsStore(
     (state) => state.commentCidsToAccountsComments[commentCid || ""],
   );
+  const account = useAccountsStore((state) => state.accounts[accountId || ""]);
   const accountComments = useAccountsStore((state) => state.accountsComments[accountId || ""]);
   const [accountCommentStates, setAccountCommentStates] = useState<string[]>([]);
   const accountHistorySortType = getAccountHistorySortType(sortType, order);
@@ -538,10 +569,10 @@ export function useAccountComments(options?: UseAccountCommentsOptions): UseAcco
   const filteredAccountCommentsWithStates = useMemo(() => {
     const states = getAccountCommentsStates(filteredAccountComments);
     return filteredAccountComments.map((comment, i) => ({
-      ...comment,
+      ...getAccountCommentWithAccountAuthor(comment, account, accountId || undefined),
       state: states[i],
     }));
-  }, [filteredAccountComments, accountCommentStates]);
+  }, [filteredAccountComments, accountCommentStates, account, accountId]);
 
   if (options) {
     log("useAccountComments", {
@@ -587,10 +618,13 @@ export function useAccountComment(options?: UseAccountCommentOptions): UseAccoun
   const commentCidToAccountComment = useAccountsStore(
     (state) => state.commentCidsToAccountsComments[commentCid || ""],
   );
+  const account = useAccountsStore((state) => state.accounts[accountId || ""]);
   const accountComments = useAccountsStore((state) => state.accountsComments[accountId || ""]);
   const normalizedCommentIndex = commentIndex === undefined ? undefined : Number(commentIndex);
   const resolvedCommentIndex =
-    typeof normalizedCommentIndex === "number" && !Number.isNaN(normalizedCommentIndex)
+    typeof normalizedCommentIndex === "number" &&
+    Number.isInteger(normalizedCommentIndex) &&
+    normalizedCommentIndex >= 0
       ? normalizedCommentIndex
       : commentCidToAccountComment?.accountId === accountId
         ? commentCidToAccountComment.accountCommentIndex
@@ -601,24 +635,26 @@ export function useAccountComment(options?: UseAccountCommentOptions): UseAccoun
     }
     return accountComments?.[resolvedCommentIndex];
   }, [accountComments, resolvedCommentIndex]);
-  const accountComment = (storedAccountComment || {}) as Partial<AccountComment> & {
-    error?: Error;
-    errors?: Error[];
-  };
   const state = storedAccountComment
     ? getAccountCommentsStates([storedAccountComment])[0]
     : "initializing";
 
-  return useMemo(
-    () =>
-      ({
-        ...accountComment,
-        state,
-        error: accountComment.error,
-        errors: accountComment.errors || [],
-      }) as UseAccountCommentResult,
-    [accountComment, state],
-  );
+  return useMemo(() => {
+    const accountComment = (
+      storedAccountComment
+        ? getAccountCommentWithAccountAuthor(storedAccountComment, account, accountId || undefined)
+        : {}
+    ) as Partial<AccountComment> & {
+      error?: Error;
+      errors?: Error[];
+    };
+    return {
+      ...accountComment,
+      state,
+      error: accountComment.error,
+      errors: accountComment.errors || [],
+    } as UseAccountCommentResult;
+  }, [storedAccountComment, account, accountId, state]);
 }
 
 /**