diff --git a/scripts/patch-ap-mastodon-misc.mjs b/scripts/patch-ap-mastodon-misc.mjs
index 04115dcd..d33eda1d 100644
--- a/scripts/patch-ap-mastodon-misc.mjs
+++ b/scripts/patch-ap-mastodon-misc.mjs
@@ -258,6 +258,41 @@ const SEARCH_REMOTE_NEW = [
   `      } // [patch] ap-search-url-resolve`,
 ].join("\n");
 
+// ── patch-ap-search-remote-uid-guard: skip AP objects with no uid ─────────────
+// When extractObjectData fails to resolve the AP object's id (e.g. network
+// error or malformed response), it returns uid:"". addTimelineItem({uid:""})
+// then matches/creates a single corrupted document shared by ALL failed lookups.
+// Any client that receives this garbage status will get a 500 when liking it
+// (likePost calls new URL("") which throws). Guard: reject rData with empty uid.
+
+const UID_GUARD_MARKER = "// [patch] ap-search-remote-uid-guard";
+// Anchor must be the two consecutive remote-marker lines that exist only here.
+const UID_GUARD_OLD =
+  `              const _rData = await extractObjectData(_rObj, { documentLoader: _rDl }); ${SEARCH_REMOTE_MARKER}\n` +
+  `              const _rStored = await addTimelineItem(collections, _rData); ${SEARCH_REMOTE_MARKER}`;
+const UID_GUARD_NEW =
+  `              const _rData = await extractObjectData(_rObj, { documentLoader: _rDl }); ${SEARCH_REMOTE_MARKER}\n` +
+  `              if (!_rData?.uid) throw new Error("remote AP object has no uid"); ${UID_GUARD_MARKER}\n` +
+  `              const _rStored = await addTimelineItem(collections, _rData); ${SEARCH_REMOTE_MARKER}`;
+
+let uidGuardDone = false;
+for (const f of SEARCH_CANDIDATES) {
+  if (!(await fileExists(f))) continue;
+  const src = await readFile(f, "utf8");
+  if (src.includes(UID_GUARD_MARKER)) {
+    console.log(`[postinstall] ${SCRIPT}: ap-search-remote-uid-guard already applied in ${f}`);
+    uidGuardDone = true; break;
+  }
+  if (!src.includes(UID_GUARD_OLD)) {
+    console.warn(`[postinstall] ${SCRIPT}: ap-search-remote-uid-guard — anchor not found in ${f}`);
+    continue;
+  }
+  await writeFile(f, src.replace(UID_GUARD_OLD, UID_GUARD_NEW), "utf8");
+  console.log(`[postinstall] ${SCRIPT}: applied ap-search-remote-uid-guard to ${f}`);
+  total++; uidGuardDone = true; break;
+}
+if (!uidGuardDone) console.log(`[postinstall] ${SCRIPT}: ap-search-remote-uid-guard — no target file found`);
+
 let searchRemoteDone = false;
 for (const f of SEARCH_CANDIDATES) {
   if (!(await fileExists(f))) continue;
diff --git a/scripts/patch-ap-mastodon-statuses.mjs b/scripts/patch-ap-mastodon-statuses.mjs
index c700ab29..c85f2d47 100644
--- a/scripts/patch-ap-mastodon-statuses.mjs
+++ b/scripts/patch-ap-mastodon-statuses.mjs
@@ -206,6 +206,33 @@ const NEW_CTX_STATE = `    // Serialize all items
     }
     const serializeOpts = { baseUrl, favouritedIds: ctxFavouritedIds, rebloggedIds: ctxRebloggedIds, bookmarkedIds: ctxBookmarkedIds, pinnedIds: new Set(), replyIdMap, replyAccountIdMap };`;
 
+// ── Patch 6: ap-status-not-found-log ────────────────────────────────────────
+// Add warn logging to findTimelineItemById so 404s on /favourite etc. produce
+// a log line showing the requested id and whether it was a bad ObjectId or a
+// genuine missing document.  Helps diagnose "Record not found" recurrences.
+
+const MARKER_NOT_FOUND_LOG = "// [patch] ap-status-not-found-log";
+
+const OLD_FIND_BY_ID = `async function findTimelineItemById(collection, id) {
+  try {
+    return await collection.findOne({ _id: new ObjectId(id) });
+  } catch {
+    return null;
+  }
+}`;
+
+const NEW_FIND_BY_ID = `async function findTimelineItemById(collection, id) { ${MARKER_NOT_FOUND_LOG}
+  try { ${MARKER_NOT_FOUND_LOG}
+    const _oid = new ObjectId(id); ${MARKER_NOT_FOUND_LOG}
+    const _doc = await collection.findOne({ _id: _oid }); ${MARKER_NOT_FOUND_LOG}
+    if (!_doc) console.warn(\`[Mastodon API] findTimelineItemById: no item for id=\${id}\`); ${MARKER_NOT_FOUND_LOG}
+    return _doc; ${MARKER_NOT_FOUND_LOG}
+  } catch (_fErr) { ${MARKER_NOT_FOUND_LOG}
+    console.warn(\`[Mastodon API] findTimelineItemById: invalid id=\${id}: \${_fErr.message}\`); ${MARKER_NOT_FOUND_LOG}
+    return null; ${MARKER_NOT_FOUND_LOG}
+  } ${MARKER_NOT_FOUND_LOG}
+}`;
+
 // ── Runner ───────────────────────────────────────────────────────────────────
 
 const FILES = apPath("lib/mastodon/routes/statuses.js");
@@ -216,6 +243,7 @@ const SINGLE_PATCHES = [
   { name: "delete-fix-C",        marker: MARKER_DELETE_FIX, oldSnippet: OLD_AFTER_DELETE,  newSnippet: NEW_AFTER_DELETE },
   { name: "status-reply-id-B",   marker: MARKER_REPLY_ID,   oldSnippet: OLD_REPLY_INSERT,  newSnippet: NEW_REPLY_INSERT },
   { name: "interactions-context", marker: MARKER_CTX_STATE, oldSnippet: OLD_CTX_STATE,     newSnippet: NEW_CTX_STATE },
+  { name: "not-found-log",       marker: MARKER_NOT_FOUND_LOG, oldSnippet: OLD_FIND_BY_ID, newSnippet: NEW_FIND_BY_ID },
 ];
 
 // Patches that need multiple replacements in one pass (applyMultiPatch)