Thanks for reporting this issue. After a thorough investigation, it was discovered that the problem has been fixed indirectly in 6000.3.0a2. I just verified and the fix reason is the port of HDRP to the new render graph compiler (already used in URP) that landed in this specific version of the editor. The port is a very high risk change with a big halo, so unfortunately we cannot backport it back to earlier versions of Unity 6. Therefore I will close this ticket, thanks for your comprehension.