Q1. Sorry, no idea. :-( I've seen this only very occasionally using MEP 2014 and a similar, but not identical spec machine. If it happened more often I'd be (some) happier as I might be able to review my most recent activity and track down a cause.
Q2. Another 'sorry'; I've little idea what you mean by "...Magix open own it's own?". Could you explain further please?