Short answer? Yeah, seems to be.
Mamluks seem most dramatically affected by it, but it happens to others as well. AIs freezing, wandering off to absurd places during a war, taking needless attrition, etc. It doesn't always malfunction - my overall impression is that it's generally better than it was before - but there are definitely some bugs in need of fixing.
If you want to upload a save in the bug reports forum, it might be helpful for the AI programmers.