In my opinion molotov, nade or RPGing a place like that is asking for some trouble. I acknowledge that this was a mistake but be that as it may, it was an avoidable one.
Reason being is that you acknowledged that the nade was from a teammate. Even if they did nothing to get rid of it and you get knocked down, they're there to protect you after the failure. And if that failed too, I don't think one death on your stats is worth avoiding by putting yourself in a potential auto-ban scenario.
So consider this as a forewarning. The next time it happens, you'll get the warning strike for wall-glitching caused by reckless play.
Solved.