Bug 2021.3.13 Several shader errors after build is done, but still build with result of Succeeded

Our game has a lot of shaders, which make the build times on URP really long, in our case 3 hours.

We have never had any issues with this and builds work fine with no errors.

Today we built and while the build was a success and the game runs perfectly, we get all these errors in the console when the build is done:



What are these? We have no clue, no compile errors or anything else.