https://forum.paradoxplaza.com/forum/threads/eu4-development-diary-2nd-of-june-2020.1395272/
-"The changelog for the Austria Patch has 1076 entries, or at least that's the amount I could remember. It's our longest list of fixes yet ever released for EU4. For comparison Holy Fury changelog is somewhere around ~600 entries."
It's one of Paradox largest patches ever, can you expect perfection from the start? They didn't promise anything, they didn't oversell it. All they did was show you the diaries and dev-clashes and let anyone wanting to buy the game to decide for themselves. I agree with op, most likely there will be a fix in the near future.
The expansion has a large amount of new content, enjoy it, or don't. I will be continuing my France-run this evening.