Just to close the loop on this: XO 6.4 (released on April 29) includes a specific fix for VNC reconnection, which may have been causing keyboard focus loss and, in turn, modifier keys to get stuck (PR #9727). At least, that’s my understanding; I could be completely wrong, so please take it with a grain of salt. If you’re on XO 6 and still seeing the issue, upgrading to 6.4 may help.

@Danp Thanks, yes of course. I got excited about fixing my problems and reported too early Well, the VM has been working fine since the export / import. I can see both drives. Although the VM running fine, since the last post I had to address two related VDIs that had been connected to the Control Domain. One being million_D and the other million_D (with a camera icon). These probably ended up here because of a aborted / faulty snapshot or backup. I disconnected them .. checked a few things ... and then forgot them. Everything is running fine now. For future googlers: During the problem solving, I found out some pretty helpful info using tail -f /var/log/SMlog. To me, this issue is solved. Thank you all for the feedback.

@olivierlambert Well, for now, I'm mostly playing around with this tech to teach myself about it, gaining experience and coming up with ideas. Maybe someday I'll be able to return some profit with the business I'm building / trying to figure out (hosting game servers). Then I'll sign up for some Pro support - and maybe then we can work on the concept of HA XO I understand what you're saying. I think I can come up with a good enough way of achieving the HA I'm looking for. Anyway, thanks for takning the time to respond. I understand your schedule is busy.