Deleting defaults did not help on my end. The issue was resolved in Xcode 26 Beta 4, but it has returned in Beta 5. Additionally, xcrun metal -v consistently produces: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain

I have a similar issue in a camera app (no ARKit), whenever I call stopRunning on capture session I see this error in the console: <<<< FigCaptureSourceRemote >>>> Fig assert: "err == 0 " at bail (FigCaptureSourceRemote.m:569) - (err=-17281) When restarting the session, there are issues with recording video in ProRes RAW format. This can be reproduced with the AVCam sample code.