Having a periodic problem with sheet metal parts in drawings on ver. 2016. I place part views on a drawing and they disappear. The views are there. I can get an outline box when I hover over it but they won't display. The problem seems to be tied to the part. Other parts will display properly on the same drawing and the problem part will not display on any other drawing. I've also found that any assembly with that part will not display properly in a drawing.

It is happening on several different workstations periodically. Sometimes it comes back, sometimes not. We have spent many hours trying to resolve it but have not come up with a reliable fix.

Something simple I hope. Thx