[Welshman](https://github.com/coracle-social/welshman) lib, that flotilla is based on
Discussion
And what files exactly in flotilla are handling these things:
1) Your app may not be resubscribing after a refresh or session timeout. Try explicitly closing old subscriptions and re-opening them
2) If relays become unresponsive, you might need a retry mechanism
3) Relays may be timing out too soon. Try increasing the connection timeout
4) If old events load from IndexedDB but not the relay, try forcing a fetch