Sorry, I wasn't watching this thread anymore.
I'm currently using LE on a RPi 400 - no more issues regarding crashes due to low memory, picture cache overflow, SMB errors etc. So I think your problem is unrelated.
I occasionally get the a.m. error message - which in my case is correct, the file Kodi tries to open is a directory in reality (and contains the backup of a DVD).
Regards,
Oliver