Lovelace, no reaction after some time/hours

Since some weeks, lovelace doesn’t work after some hours.
Hassio is working with no Problems in the Background.
RPI3b has only 5% Prozessor and 0.3 GB free Space.

App gets no Data, Browser is loading and loading… there must be some data, because i get no timeout or something.
Only way is restarting the core over SSH.

There are many Users, having this problem (since years) but there seems to be no solution at all.
That sucks!

Are you sure that the Pi is still on the same IP address? Make sure its DHCP lease isn’t expiring and the router is handing it a new address.

Yes, still the same IP (from Fritz).
Sometimes some things still works.
At the moment I can access via ftp, ssh and some entity’s still work.
The dashboard is working, settings doesn’t show up, picture entity’s don’t work, rpi power status is off (what???), no connection to any camera and so on.
Restart with the App doesn’t work.
Restarted via ssh with “ha core restart”.

I think the problem is the last Bluetooth integration, but I can’t figure out how to disable it.

I’ve seen similar behavior with an integration I manage that had a deadlock. If the Bluetooth integration is using locks it may have a race condition that causes the deadlock.