So confirmed... I took a flight from LKPR to EDDK and when approaching the airport the FPS dropped again to a value of around 8-10 and in the distance it looked like the airport was empty again, I flew in the dark... I turned off AIG Traffic w what happened the entire scenery of the airport was starting to load, so it had already landed, albeit with a fluctuating FPS of around 15-18, in the fully displayed scenery. Why am I writing this? Because there was a mistake in previous discussions that this can be caused by GSX in combination with AIG. So the conclusion? GSX is innocent again, as with the initial suspicion that GSX caused everything after the release with CTD, but the error was in the update and more on the Asobo side, than the GSX error. Let's hope that in time FS Traffic will be really elaborated and not it would be a shame to fight with GSX. Otherwise, as far as AIG Traffic is concerned, it is not bad and is part of the MSFS so that the airport is not empty and there is at least some traffic around, and if the situation he wrote about happens, all you have to do is turn off AIG at a significant decrease in FPS when approaching the airport and thus you will not land on a lonely field.
I also find it strange that it happened to me a second time, but at an airport that is activated via Aerosoft One, similar to what happened to me with LDZA, which was again via this program, I haven't had the problem at other airports yet, so I don't know.
I use SU10B.