1] Search Behaviour change. Here is the list of recent changes made to File Explorer in Windows 11/10. So if the problem is because of behavior change, then you should know that it is not a bug.

8] Windows File Recovery Tool may or may not recover .CHK files in FOUND.000 folder but it’s a nice little addition here that you can try as well. Is it OK to delete .CHK files?

PowerShell recovery scripts using WBAdmin no longer work in Windows 11, but VHDX mounting offers a manual workaround for ...

Microsoft has warned Windows 10 and Windows 11 users that files might not be deleted after resetting the device using the "Remove everything" option.