I'm not sure whether this is a bug or an intended new feature (I hope it's not!) but here is the issue I'm experiencing after latest Vitruvian Update:

During battle when I select a unit and give it a move order that unit becomes unselected after move order is executed, so I have to select it again in order to give an attack order; furthermore, attack preview does not come instantly as it used to be (I have to move the cursor on enemy unit twice to see preview).