Such behaviour indicates that the digitizer chip cannot get proper sync lock, or just reports incorrect parameters to processing logic. I’m not sure why that doesn’t happen with 0.76, but you could try freezing mode change detection to rule out the latter option? That can be done simply by e.g. pressing profile hotkey button while sync is still working, but without selecting a profile. The result whether that prevents subsequent sync loss or not should give me some hints where the problem might lie.