I have recently started experiencing complete Mac hangs and subsequent restarts (Kernel Panic) when SmartGuard has to delete a snapshot to create a new one. It also causes corruption of the W10 VM. Creating a snapshot without the need to delete an old snapshot is fine. Using https://kb.parallels.com/111736 produces the same problem unless I start the Mac in Safe Boot mode, which allows the merge to complete. I do not have this problem with my XP VM or with my W7 VM. I use MacOS Catalina and Parallels 14. The problem started prior to the Catalina upgrade, so it is unlikely to be a Parallels/MacOS compatibility issue. Whereas the above workaround is OK in the short run, I would ideally like a proper fix for this. Any suggestions welcome. Please.