I remember reading that bosses just scale to the amount of players so my guess is solo is actually solo. This would make the solo or trio only decision even stranger…

Yup, listen to this. I had problems with my PETG layers coming apart, especially the first few. I lowered the print and fan speed drastically. Fixed all the problems I had.

Hope you were able to fix your Home Assistant. I just came to quickly recommend a way to easily backup your installation. https://github.com/sabeechen/hassio-google-drive-backup