Other people have mentioned similar issues and that has been reported as well (ACEO-7052), but is not investigated yet. Olof and I have done some tests as you can read in the other thread, but both of us couldn’t reproduce unfortunately. Please file a bug report with the in-game bug report tool, so your save game is also included then the devs have another reference. If you mention ACEO-7052 in the bug description they know the relation.