Every once in a while, a scout squad of mine will be frozen seemingly with a throw grenade command queued. They do not respond to movement, additional attempts to throw the nade, or anything. Effectively, I cannot use them for the rest of the game, or I think until they are CC'd and it cancels the command.
I'm not sure how to replicate it, but I'm going to see what I can do tomorrow. I've seen it at least twice now within 4-5 games.