I'm also having this issue. My characters freeze in almost every engagement. I have a dual wield rogue as my Inquisitor, but it can happen to every character. My group is usually me, Cassandra, Solas and Dorian, and they will all get stuck from time to time. I can't quite tell when or why, but usually it is when I'm using tactics mode, but usually not when I'm focusing on that particular character. The character becomes unresponsive, and won't take orders. The only ways I have found to fix it during combat is either to exit tactical mode and have the character jump, or else use the disengage button (while time is moving) and then give the units orders again.
The issue goes away when combat ends. Like I said, it is not rare, it is happening in basically every engagement, and in long engagements, it happens even more.