Done. Still does not work. 🙁
When I turn off and on the bluetooth speaker, the squeezelite instance isn’t stopped and apparently cannot reconnect to the speaker at a later point. So I have to manually stop and start the squeezelite instance.
The re-install was a pain, btw, as the „Restore Settings from File“ function in the Squeezeplayer tab does not work. I only get „Upload NOT successful!“.