Reported as FB17265373

I reported this via Feedback Assistant - see FB18666175

I started seeing this exact issue on Tahoe but then started getting it on macOS 15 too, so I don't think it's Tahoe specific. There's an existing thread running here: https://developer.apple.com/forums/thread/791541.

I did try the "Clean" option in Xcode Cloud a few days ago and I'm afraid it made no difference for me. Unfortunately because it's a random issue it's quite possible to get a few good builds before you get a bad one ☹️.

Same issue here