I recently played a game as Support. In Steel Peel, I was near our base right by the glass and an Assassin grappled me as I threw an Airstrike. The AS wound up killing her during the animation, and when I recovered, I was stuck. My health bar was depleted, but I could still attack/heal using the heal gun. I couldn't move, use or buy skills, or even take damage. Here is a picture to kind of show what I'm trying to say:
This has been a known glitch since September, sadly Uber is having a very hard time trying to reproduce it so they can fix it. I am starting to notice it happens on PC far more often then the XBox version. Although it could also be happening just as much but not many XBox players are reporting it. viewtopic.php?f=17&t=2743 Thread on the whole subject.