Does anyone notice that in Street Brawl "Protected" Just doesn't work half of the time?

Especially if you go into overtime, I just played a game where our minion wave was pushed to the bridge and the enemy seven just walked up behind our tower and left clicked our walker to death even though there weren't any minions even close to him, I checked the replay and our walker did not have the "protected" debuff.

Game ID: 88082373