I've been having #bluetooth issues (#cinnamon crashed everytime I connected my BT headphones) since a recent system upgrade.

It seems this was caused by a bug introduced in #wireplumber 0.5.13.

I've downgraded wireplumber and libwireplumber to a previous version and now BT is working nicely.

https://bbs.archlinux.org/viewtopic.php?id=311515