I have encountered multiple instances where the game just disconnects randomly while the match has been running smoothly. Close hearthstone app and relaunch? The match is already over. Do not close hearthstone and wait for it? This is what shows up:
ht tps://imgur.com/a/rqvgSGi (remove the space in https)
Before you say that it is my own connection problem, I will tell you that it is not. I live in asian city, play hearthstone in asia server and play overwatch in the us server. I have not encountered any disconnection problem in overwatch.