At some point a long time ago while writing the OMEMO code I entered in the device features. While returning the features that Monal supported, I returned eu.siacs.conversations.axolotl.devicelist instead of eu.siacs.conversations.axolotl.devicelist+notify . The missing +notify meant I didn’t get notifications when the device list changed causing all sort of havoc. Thankfully its been fixed and there is a new Mac beta up as well as a TestFlight build. Thanks everyone for all of your testing, its been gradual but few things shine a light on bugs like testing.