I'm using SW 2018 SP 4.0.  We switched to this version at work a month or two ago.  Since then, I've noticed something haven't seen before.  I made a hole in a part using the hole wizard, and then, on a drawing, called out the hole as a hole, and added a tolerance.  I then went back into the part file and opened up the hole, changed nothing, and closed it.  When I went back to the drawing, the tolerance had disappeared.  I did this multiple times on multiple computers all using the same SW version and got the same results.  If I create the same hole as a cutout, there's no problem.  If I call out the hole diameter with a standard smart dimension, there's no problem.  Does anyone know what's going on?