Thank you for your help. I can't wait for the patch.
In towns it lags when I enter it, but after some time it would be normal until i fight someone in the town (btw, loading for the town is very long). If you mean sieges, yes it is bad. Campaign map is fine. My maximum battle size is 400. The battles (in the field) are now playable, but it's still not good.
It is working again. Thanks for the patch!