diff --git a/server/util.lua b/server/util.lua
index 04cf58924..e8fc3b81f 100644
--- a/server/util.lua
+++ b/server/util.lua
@@ -636,7 +636,9 @@ function util.cooldownLeft(cid, key, ms)
     if type(cid) ~= 'string' or cid == '' then return 0 end
     local b = buckets[cid .. '\0c\0' .. tostring(key)]
     if not b then return 0 end
-    local left = (tonumber(ms) or 0) - (GetGameTimer() - b.last)
+    local since = GetGameTimer() - b.last
+    if since < 0 then return 0 end
+    local left = (tonumber(ms) or 0) - since
     return left > 0 and math.floor(left) or 0
 end
 
diff --git a/web/src/apps/_games/useOnlineLobby.ts b/web/src/apps/_games/useOnlineLobby.ts
index 31ba54554..ffee3cc14 100644
--- a/web/src/apps/_games/useOnlineLobby.ts
+++ b/web/src/apps/_games/useOnlineLobby.ts
@@ -128,8 +128,8 @@ export function useOnlineLobby(game: string, options: UseOnlineLobbyOptions): On
     const inHub = options.inLobbyScreen && !lobby && active;
     useEffect(() => {
         if (!inHub) return;
-        void lobbiesApi(game).then(setLobbies);
-        const timer = setInterval(() => { void lobbiesApi(game).then(setLobbies); }, 3000);
+        void lobbiesApi(game).then(setLobbies).catch(() => {});
+        const timer = setInterval(() => { void lobbiesApi(game).then(setLobbies).catch(() => {}); }, 3000);
         return () => clearInterval(timer);
     }, [inHub, game]);
 
@@ -228,7 +228,7 @@ export function useOnlineLobby(game: string, options: UseOnlineLobbyOptions): On
         setReadyApi(r);
     }, []);
 
-    const refresh = useCallback(() => { void lobbiesApi(game).then(setLobbies); }, [game]);
+    const refresh = useCallback(() => { void lobbiesApi(game).then(setLobbies).catch(() => {}); }, [game]);
 
     const returnToLobby = useCallback(() => {
         void returnToLobbyApi(game).then(r => {
diff --git a/web/src/lib/clipboard.ts b/web/src/lib/clipboard.ts
index 96a6b58f5..d2d753c27 100644
--- a/web/src/lib/clipboard.ts
+++ b/web/src/lib/clipboard.ts
@@ -24,7 +24,7 @@ export function copyToClipboard(text: string): boolean {
         ok = false;
     }
 
-    try { void navigator.clipboard?.writeText(text); } catch { /* ignore */ }
+    try { void navigator.clipboard?.writeText(text).catch(() => {}); } catch { /* ignore */ }
 
     return ok;
 }