That being said Regimental (and to an extent Corps) AI has gone whacky with this patch to the point of making the game basically unplayable for me.
Is this in MP or solo ?, we have played several MP games with the latest beta patch and all looks well to me, I've been watching skirmishers be deployed to shoot down artillery crews, I've seen Cavalry attack artillery batteries while they were re-deploying from one place to another, I saw two Austrian Regts engage one French, both with skirmishers sent out in front, attacking forces deploy artillery, Cav engage anything that is a threat, if they think they can win, or they avoid engagement, if they know they will lose......have you checked your doctrine file is set as you would like units to behave ?.
There are a few odd things here and there, but I'd be surprised if that never happened taking into account the mighty scale of the game and all the 100s of different things happening.
Corps orders are fine the vast majority of the time, again, a couple of odd things now and then, but that does not stop this being far and away the best Napoleonic game for us to play.
As far as solo is concerned, I don't know, as I only use that to quickly test new maps and MP "plans" now and then.