Hi!
So you need to update your DLSS version. To do this you need to download a program which is called DLSS Swapper.
Here is the link: GitHub - beeradmoore/dlss-swapper
Install the program scan the game whose are using DLSS and before you do anything download the latest DLSS version in the program. You can do this in the “Library”. After that go back to the games and select MSFS and update it to the latest version. Currently: 3.5.10. This not just fix these problems with the SU14 update but you will recognize a huge perfomance increase too. Let me know if it’s worked. For me this solved the problem and I even got 20% performance increase too.
King regards,
Marci1229