Why are these files being skipped all of a sudden?
Probably Edge and Explorer, or one of their components/processes, is still running (maybe in the background).
CCleaner cannot clean applications that are still open/running.
You can look in task manager to see what is still running.
Or take a look here:
Thank you.
Also in Windows Settings go to Privacy.... Background Apps (on left hand side list)... and make sure Edge is unticked.