I'm fighting for years with this problem and I wonder how many other people are affected by it.
After going online or porting to anther sim, large mesh-objects often remain invisible until I either right-click on them or toggle max view distance.
This is extremely annoying, happens with different viewers, different PCs I had during the years ...
Theres nothing exotic on my end that could explain it. A standard PC (i7-8700, nVidia 1080, 32 gig), fast conenction (100mbit), ... usually using firestorm. Clearing cache from time to time.
Whats going on here?