I think this issue has to do with lights, hence the mention of the mesh being lit in the title. When I animate the camera towards this object 80 units away, there is a short time the ground disappears.
In further events activating the same animation there is no disappearing.
There are 2 more clickable machines. Each have 2 spotlights facing them (with shadow generators) and also hitting the ground.
In total there should be 8 lights affecting the ground.
I tried upping maxSimultaneousLights on all affected materials, but to no avail.
Since the disappearing hiccup doesn’t happen after travelling towards a machine once, I could also live with loading whatever is happening on that first time beforehand. I just need to know why it happens and what gets calulated.