and all internet capabilities disabled when I nd usage every night.
If I had to guess friend...
I reckon if you left your pc on but the internet was "disabled" some chore the win11 was wishing to do, like the always busy svchost.exe, had a bit of conflict resulting in the screensaver app stalling.
So ya know... it seems the windows caches the network portion of background processes when the internet is not available and runs that portion when it is, so to speak.
Like if you open resource monitor and peek at the things the pc is doing you may note even with no stuff being requested by you as in open browser or program or anything at all, your machine is quite busy entertaining itself... >=)
If your internet is not available to the pc for whatever reason, it just does the things it is able to and patiently waits until internet access is restored, when it is, your pc not only does the things it will do, it also does the things it attempted to do but couldn't.
As insidious as that may sound, most of the stuffs your pc is doing is "said to be" for your convenience as in make the things you may do more snappier, so to speak.
Most likely your screen freeze was just some fluke-e-ness and nothing to be concerned with as long as it is not some persistent snowballing affect.
Something else to consider is, it seems there are a shockingly large and increasing amount of legitimate and nefarious entities that utilize individual's pc's to do various processing tasks, apparently with and also without the individuals' awareness of, or participation.
The shutting down thing I mentioned in first reply is a fix by the way.
~Write On Elvis