Weird issue after game

I have had issue after game where it says game recorderded message then it the game stops and i re-enter heartstone why does this happen ?

I was just in a game with a warlock that i was winning i had board and he one 1 health minion and i get disconncected and when i came back lucky it said it i won my last ranked match.

All of this lag happend after the new event started i have lag in game and i was also n ot able to connect to forums for a brief period idk if that was connected but it seems ok now.