I think we've established many times that I was behind cover, behind him, and invisible. I wasn't even directly behind him. I was 5-10 meters. No way would a Stormtrance suddenly shift to an enemy in that position. Nova Bomb is more arguable, but given that he wasn't facing my direction in the slightest, I doubt it would have worked. It was on Vertigo, so it wasn't a small, enclosed room so much as an area of play. Near B.
But even crunched and invisible you'll still show up on the radar albeit briefly. As long as he knows the direction he can guess . I think if you simply put stormtrance on you could just spam it whilst moving around and chances are the lightning will reach you in the end