This doesn’t sit with my tests so far. Sometimes just reselecting the right track to be on record will work. Other times however you need to eject the input slot in AB and reload it to get Cubasis track arming working properly again. It also doesn’t seem to just apply to Animoog but applies when the system is under pressure and possibly is triggered by using undo when running a complex setup? (I’ve had undo fail with an error message and whole sections of a project disapear 
)
The default to arming track one and the drop out to mike input/no input seem to be different bugs.
Most of the things that go wrong seem related to the undo function. I’m beginning to think that currently the best thing is never to undo anything!