After phone /Android upgrade: 1. App closes silently - 2. (forced) re-open needs reauthentication

Been using a previous version on my previous Android phone for years. A database kdbx could stay opened for weeks, even months - able to unlock via "quickunlock".

Now I switched hardware (phone), now on Samsung S23 , Andoid 15, OneUI 7.0. I open the kdbx-database, and when I wake up next morning - I find it closed. Sometimes it stays open for a few days, but will close silently.
It's an issue, as I need physical keygenerator to open it - I don't take that with me when leaving for the bank or supermarket.

1. Why does Keepass2Andoid close frequently, without prior ask or note?

2. Different issue: "Changes to the DB, Re-open it ?" - Always happened when having the kdbx opened on Desktop simultaneously. In previous installation (see above) however, the reopen was possible without full re-authentication . Nowadays, the "re-open?" behaves as if I open first time. Can it be avoided?Thanks!
Chris

v1.12r5

Start by reproducing both reported behaviors on the stated Samsung S23 running Android 15 and One UI 7.0 with Keepass2Android v1.12r5. Investigate the silent database closure and the reauthentication required after simultaneous desktop use; done means both behaviors are explained and the agreed fixes are verified without disrupting database access.