Devourer bugged and clients crashing

In my last game the enemy shack had a devourer but instead of 1 wolf following him he had 5wolfs that kept staying until he had about 7 at one time. each dealing their own damage and even acting like a creep where it would just keep attacking like a normal creep even if the champion was just out of range to attack. it happened on the black market game mode so idk if its effected anyone else on other maps. My other issue to bring up is I've noticed a lot of lag happening in black market brawl each time someone upgrades a brawler the game lags a little then when there are more brawlers then minions the game seems to drop its frame even cause some people to crash. I've had it happen in 1 game so far and watch my teammates and enemies DC from this. just something to bring up i though.