Hi everyone,
Today I launched UE5.1.1 and it loaded a random project within a couple of seconds, no shader problems, nothing. Then I decided to test out the car configurator project from the marketplace (purelly out of fun), the marketplace said that it wasn’t compatible with 5.1 (but it mentioned that it was, but whatever). I loaded it up on 5.0.3 and it worked normaly. After powering of and coming back later all of my other projects were still fine and loaded with no compiling shader wait time, but I accidentaly launched the car configurator project with 5.1.1 and the message said something about copying 5.0 to 5.1 (honestly I don’t remember the details). The project took about 20minutes instead of a couple of seconds and suddendly all of my other projects were compiling shaders for an hour (+8000) shaders even though there was nothing there and was a very small project.
My fix was deleting the car configurator project from my pc and it fixed everything. I honestly do not know why it worked, but it did. So I hope that this heleps someone who has a similar issue…