[2023] Saving/loading suddenly taking ages

This is only confined to this one modded campaign, is that right? ANy vanilla campaigns you have or might start now work okay?

If so, please contact the mod authors in the Steam Workshop, or our User Mods forum.

Crusader Kings III - User Mods

forum.paradoxplaza.com
Good luck!  

I don't recall similar reports here from unmodded games, but of couurse that doesn't mean it doesn't happen.

From what you say you believe this is a game bug of some sort, is that right? If so it really belongs in the Bug Reports forum.

But if you feel tech support-type measures may be able to help you regardless, let me know and I'll try and come up with some things to try.  

Looking at this reports you linked: the Steam one was shown to be caused by a mod, "Dynastic Relation". The Reddit one had 14 mods enabled. The unmodded one from this forum was from November 2022 (so may be an unrelated issue/cause). And the recent one from this forum had 9 mods in use.

kenyér said: if I was one of your devs I would consider this a core problem on its own that, at the very least, is worth giving a quick look.

That can only happen if the issue is raised in the Bug Reports forum, the devs (or rather QA) do not read or monitor this forum or the main game one.

That said, if it is as sporadic as these reports indicate it may be hard for the devs to duplicate! In any case I think that's the best way forward for you.