Hey, played a game as proxy on Terminal and when I entered a container to plant C4 there was a mine there. I let go of the plant key when I saw the mine, which switched me back to the knife, and at that exact moment the mine exploded, yet I took no damage.
Here’s a video: https://www.youtube.com/watch?v=FpQcGQyNweo
I had this last night on Trainyard @NxA_Noxie. Exact same scenario. I was on the attacking team, first objective, I went to the door to construct / close it and there was a proxy mine on it. Soon as I noticed it I stopped, switched to weapon, and it exploded in front of me but I took no damage. Tbh it felt like there was a mild delay though before it exploded.