Hello there!
I have noticed two issues that may need fixing.
If it matters, I am playing on Windows and on EU servers.
Ship captaincy status
When the captain of the ship leaves the session, the ship loses captaincy status, even if there are other players on the ship that can become the captain or the ship or just be a "co-captain". Some people have to quickly go do something irl and get AFK kicked while doing it, and the ship loses its captaincy status without any indication of that happening (except not being able to move trinkets and then afterwards no way to sell to sovereigns).
Solution?
If it is intended behaviour that the ship loses its captaincy status because of that, at least inform the crew that it has lost captaincy and add back the captaincy status if the captain rejoins the game afterward.
Alliance flag
I've noticed that in the latest release build the alliance flag dissapears after a while, even though the alliance is still active. I have no idea what could be causing it and I do not alliance enough to repeat the bug, though that is certainly something to investigate.