(Emphasis mine)
you hit the nail on the head with this one. An easy comparison would be comparing the 737 by PMDG and a knockoff you found on Flightsim.to. The odds that the knockoff you found on flightsim.to is just a model and the thing flies like…idk an Extra 300 are pretty astronomical. The Boeing Extra 73007-800 might be reacting to the atmosphere based on how the developer did the flight model on the plane so it’s probably correct in the sense it’s flying the way it’s designed, even though it’s not how that plane should be flying.
Developers can make whatever flight model they want really. It can be accurate or it might not. It seems to me that the average amount of time for at least an accurately flying airframe to be developed is around two years. Just based on the high fidelity planes we see available now