What is this glowing red box?
So I'm running my guys around, and I see this glowing red box. It's doing that "closing" animation that the blue boxes do when you hover over one of your soldiers who is selectable. Any idea what's causing this?
The normal blue movement box becomes red when hovering over a place where your soldier can't reach.
What you are showing is a bug, where the red box "got stuck" at that place. If it really bothers you, try to save and reload the game, or just continue and disregard it.