Experiment. Load 2 instances of Mobius and see if they will
sync together directly, ignoring the host time (Bidule can do that, for VST at least ).
This might give a better idea of where the problem is.
In order to problem solve sometimes it's informative just
to do an experiment.
It doesn't solve the problem directly, but often throws up useful information
that helps solve the problem.
You're currently in a bad position, in that the info you provide
doesn't tell enough to know the source of the problem.
...and even Per hasn't come across it before.
sorry to not be a big help,
and yes in many ways old XP was nicer, it actually displayed error messages
rather than just shutting down your program without explanation.