As some of us have found out in another forum, it seems that if you have your graphical settings on ULTRA you are actually not on ULTRA but on a lower quality setting. You can test this at EGNX runway 27. If your settings are really on ULTRA you would see windows and other details on the right-side white buildings. If you don’t see these details, you’re not on ULTRA, even when your GUI indicates you are.
There is a temporary workaround. Load a flight, click ESC and go to GENERAL OPTIONS → GRAPHICS. Now choose the Global Rendering LOW-END profile, click Apply. Then choose ULTRA again, click Apply, GOBACK and resume your flight. Now your visuals are indeed on ULTRA and you should see much more details.
Unfortunately, this workaround has to be applied every flight even if you didn’t leave the sim but only went back to WORLD MAP to choose another location/flight.
Please, if someone with better skills can reproduce it, and may also report to ZENDESK.
Cheers, Harry