I've done some further digging and noticed weird behaviours by comparing:

• Event viewer entries when login successful VS Event viewer entries when login fails;
• App Volumes log when login successful VS App Volumes log when login fails.

I compiled them in an Excel table (I attached it if anyone is willing to check it).

Therefore I'd like to ask something: Is App Volumes Writable Volumes (Profile) supposed to work on PERSISTENT desktops? Or only on non-persistent?

Thank you very much.