Session closed - exploit?

Hi,

Lately I often get in middle of pvp game an error “Session closed”, and rumble app is crushing (on android phone).

But what got me suspicious is that in all cases it happened exactly on the second that the opponent found themselves on the lower hand and saw that they gonna lose. The crush always happend in this exact circumstance, and never on any other occasion.

Blizzard, can you please investigate to see if attackers are using exploit to crush the opponent app in pvp, and fix it / ban people who used it?