I tried with a fresh install of MacOS Sequoia 15.1 Beta 6 and xCode 16 from Appstore. Nothing additional installed. Problem exist. I think we have to wait for a new version of MacOS Sequioa.

Sorry, its not really fixed in MacOS Sequoia 15.1 Beta 6. But the problem exists only with MacOS Sequoia with MacOS Senoma it works fine, even with xCode 16.1 Beta (all versions). After upgrade to MaxOS Sequoia the problem is here. Erased my mac and restored a backup with MacOS Senoma it works fine again.