Safe reset (recommended): Settings → Advanced → Reset app cache. Reloads the service worker and pulls the latest build. Your tasks, habits and settings are untouched — they live on the server.
Hard reset (last resort): browser Settings → Site data → clear for lemtask.com. This also removes offline queued actions, so reconnect first and let sync finish.
Version banner appears? Tap Reload to update. Skipping this leaves you on the old build until next reload.