Try these in order:
- Settings → Notifications → Push — toggle off and back on to resubscribe.
- Check OS permission — iOS Settings → LemTask → Notifications; Android Settings → Apps → LemTask; macOS System Settings → Notifications → your browser.
- Disable battery saver / low power mode — both silently pause background push on iOS and Android.
- iOS 16.4+ required — earlier iOS versions don't support web push at all.
- Reinstall the PWA if all else fails, then re-enable push. Reinstalling resets the underlying subscription.
Still nothing? Contact support with your OS version and browser.