I just sent a screen shot to GS.. It is becoming more frequent now...
If you wouldn't mind, look more closely at your doors when this happens.... For me, it is not just the material changing.... It is acutally a SLAB Door instead of the French door... For ArchTop doors, the arch resolution changes to 2 so I get a Triangle top door instead. The hardware also disappears. All reappear after opening and closing the settings dialog w/o changes.
Duane
Visual Frontiers
AC25 :|: AC26 :|: AC27
:|: Enscape3.4:|:TwinMotion
DellXPS 4.7ghz i7:|: 8gb GPU 1070ti / Alienware M18 Laptop