Nuked delta index by setting config version back to 15 on one device (alex-uni) and it is also gone on another device that is not even connected directly to that one, weird stuff…
I will see if the other 2 devices that showed the same also got fixed by that as soon as I am home. Should I save the database before connecting them for analyzing what is wrong there or save some logs with some STTRACE active when connecting (and potentially fixing it being stuck)?