Yep. It can be as simple as the new client hasn’t gotten the lists cached yet, or the default relay set for the client doesn’t include one with my list.

Some of this might be alleviated by allowing users to make temporary changes to their relay list in clients, without saving them as an event.

That way, i open new client X, temporarily add TheSameCat relay, and know the client can find my real lists.

Not sure how to make that a good UX though.