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.

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