The spellcasting timing annimations are a bit off.
Usually, right after you launch a spell, before it hits you can start casting and your character would start the annimation but now he reverts to standing there like he is out of combat. You can avoid this by not starting a new cast until your first cast hits the target or if you have this set up in settings, you can hold down the cast and he starts the next one.
Also after launching a spell, you used to be able to start pre-loading wanding, now you cant.
I hope this is a bug.