Barrel's not exploding when hit

[iBlue]

Similar thing happened on new FUS when a missplaced barrel happened on a hard server yesterday. It was basicaly under the shieldwall and wasn't blown. The shieldwall got broken later on and bots swarmed the barrel, still didn't blow. After that a player in an attempt to rescue us tried to kill barrel himself and 4 CTS's ended up sticking out of it and still wouldn't blow. I dont have the screenshots either because it was a fray and i didn't think that far in advance. The barrel was very close to the walls but it wasn't inside it, merely touching or having a tiny part of it inside the wall. Some bug might have occured there.
Not enough to search for a bug yet i assume so i'll try to get a screenshot if it happens to me again.