Serious regression: https://www.spinics.net/lists/stable/msg499206.html
Upgraded 9.0.4 to 9.1.1. No problem with the upgrade. No errors logged.
The ownCloud software, including Calendar, Files, tasks, Contacts, and Apache web interface working with no problems.
Android clients: DAVDroid, Calendar, Contacts, Tasks, NextCloud all working with no issues.
Linux CLI client cadaver working without problems.
Bluetooth headset stopped working after this update on KDE. Log gets: [pulseaudio] module-bluez5-device.c: Profile has no transport Manually enabling HSP/HFP profile work, but reverts the next time the headset is connected.