I've copied several of your accounts. It seems unlikely to be any specific mod or ability you're using. I tried following the video that was posted however the quality is low and the action is extremely fast so it's not really clear what happened. I did try killing via Banshee spots, by using Viral status, by using Hunter Munitions, and having Hound affected by shield drones during/after the kill. Nothing bad happened.
However, a log was sent in that might have a clue. Nothing shows up in the log when the hound breaks, but a question: how many of you are having an no-stab hound where it's the first hound of your game session? I don't mean the first hound in the mission, I mean the first one that you see after launching the game. Is this only a problem that starts to show up after your Sister has spawned into a mission and you tried to stab her for example? Or maybe the first mission is always fine, but then the longer you play the more hounds b...
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