diff --git a/surfsense_backend/app/routes/new_chat_routes.py b/surfsense_backend/app/routes/new_chat_routes.py
index 53e6c8e09..11a8abeae 100644
--- a/surfsense_backend/app/routes/new_chat_routes.py
+++ b/surfsense_backend/app/routes/new_chat_routes.py
@@ -635,8 +635,16 @@ async def delete_thread(
 
         # For PRIVATE threads, only the creator can delete
         # For SEARCH_SPACE threads, any member with permission can delete
+        # Legacy threads (created_by_id is NULL) have no recorded creator,
+        # so we skip strict ownership and fall through to legacy handling
+        # which allows the search space owner to delete them
         if db_thread.visibility == ChatVisibility.PRIVATE:
-            await check_thread_access(session, db_thread, user, require_ownership=True)
+            await check_thread_access(
+                session,
+                db_thread,
+                user,
+                require_ownership=(db_thread.created_by_id is not None),
+            )
 
         await session.delete(db_thread)
         await session.commit()
diff --git a/surfsense_web/hooks/use-comments-electric.ts b/surfsense_web/hooks/use-comments-electric.ts
index b90f52dce..6ca7748b5 100644
--- a/surfsense_web/hooks/use-comments-electric.ts
+++ b/surfsense_web/hooks/use-comments-electric.ts
@@ -393,11 +393,19 @@ export function useCommentsElectric(threadId: number | null) {
 			}
 
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe();
+				try {
+					liveQueryRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 		};
diff --git a/surfsense_web/hooks/use-connectors-electric.ts b/surfsense_web/hooks/use-connectors-electric.ts
index 08ef0621d..951f1d15a 100644
--- a/surfsense_web/hooks/use-connectors-electric.ts
+++ b/surfsense_web/hooks/use-connectors-electric.ts
@@ -180,11 +180,19 @@ export function useConnectorsElectric(searchSpaceId: number | string | null) {
 			syncKeyRef.current = null;
 
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe();
+				try {
+					liveQueryRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 		};
diff --git a/surfsense_web/hooks/use-documents.ts b/surfsense_web/hooks/use-documents.ts
index 6060b9572..e3a315cd1 100644
--- a/surfsense_web/hooks/use-documents.ts
+++ b/surfsense_web/hooks/use-documents.ts
@@ -230,11 +230,19 @@ export function useDocuments(
 		async function setupElectricRealtime() {
 			// Cleanup previous subscriptions
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe?.();
+				try {
+					liveQueryRef.current.unsubscribe?.();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 
@@ -420,11 +428,19 @@ export function useDocuments(
 		return () => {
 			mounted = false;
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe?.();
+				try {
+					liveQueryRef.current.unsubscribe?.();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 		};
diff --git a/surfsense_web/hooks/use-inbox.ts b/surfsense_web/hooks/use-inbox.ts
index 56ddb46a4..b66f75a3a 100644
--- a/surfsense_web/hooks/use-inbox.ts
+++ b/surfsense_web/hooks/use-inbox.ts
@@ -129,11 +129,15 @@ export function useInbox(
 				// Skip if already syncing with this key
 				if (userSyncKeyRef.current === userSyncKey) return;
 
-				// Clean up previous sync
-				if (syncHandleRef.current) {
+			// Clean up previous sync
+			if (syncHandleRef.current) {
+				try {
 					syncHandleRef.current.unsubscribe();
-					syncHandleRef.current = null;
+				} catch {
+					// PGlite may already be closed during cleanup
 				}
+				syncHandleRef.current = null;
+			}
 
 				console.log("[useInbox] Starting sync for:", userId);
 				userSyncKeyRef.current = userSyncKey;
@@ -174,7 +178,11 @@ export function useInbox(
 			mounted = false;
 			userSyncKeyRef.current = null;
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 		};
@@ -199,7 +207,11 @@ export function useInbox(
 		async function setupLiveQuery() {
 			// Clean up previous live query
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe();
+				try {
+					liveQueryRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 
@@ -297,7 +309,11 @@ export function useInbox(
 		return () => {
 			mounted = false;
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe();
+				try {
+					liveQueryRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 		};
diff --git a/surfsense_web/hooks/use-messages-electric.ts b/surfsense_web/hooks/use-messages-electric.ts
index e8c82e92b..728503de9 100644
--- a/surfsense_web/hooks/use-messages-electric.ts
+++ b/surfsense_web/hooks/use-messages-electric.ts
@@ -142,11 +142,19 @@ export function useMessagesElectric(
 			syncKeyRef.current = null;
 
 			if (syncHandleRef.current) {
-				syncHandleRef.current.unsubscribe();
+				try {
+					syncHandleRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				syncHandleRef.current = null;
 			}
 			if (liveQueryRef.current) {
-				liveQueryRef.current.unsubscribe();
+				try {
+					liveQueryRef.current.unsubscribe();
+				} catch {
+					// PGlite may already be closed during cleanup
+				}
 				liveQueryRef.current = null;
 			}
 		};