This has been bothering me for a while, but it has recently become a bigger problem while playing as Poland (more micromanagement). It's really simple: after issuing an order to a unit the unit sometimes becomes unresponsive for a while and goes on only doing the given task, ignoring all other commands.
Example: I tell a cavalry unit to charge, but want to cancel that order, it won't listen.
It's even more annoying in deployment phase. It let's me move my units around for a while and then all of them become unresponsive (major pain in the backside when trying to deploy stakes)
When they stop listening, all possible order buttons become greyed out. It affects all units.
I hope someone can help me with this because it's ruining a mod that is great otherwise.