I\'ve had the same issue. It does only occur with turn-able blocks as far as I can tell, as I\'ve had no problems with hulls and powerblocks, etc. The larger the ship, the more of a problem it becomes, which I suspect has something to do with the game trying to rerender all those blocks after I stop holding control. With smaller ships, it seems to take a while and eventually show up again, but with any decent-sized ship I have to restart.