In apps that use legacy password-based login, like Bluesky, occasionally I will be logged out and prompted to log back in. This doesn't with OAuth logins like with Tangled.
Not sure of the exact circumstances/timeframe that causes this to happen, I've had some days where this has happened several times and other days where it hasn't helped at all.
I had this happen once and saw something about refresh token being reused in the server logs, maybe it's related?