We are having the same issue. It's an impediment to the use of XCode cloud so we are switching back to Gitlab. Does anybody has any news on this? A workaround maybe?

I think this is related to the automatic saving file feature. I noticed that sometimes if i save the file manually and build, it completes correctly, but if i don't save the file and let xcode do it, it will fail on the first build, and then on second try succeed. This is so annoying to be honest.