My game closes

Hello community.
I want to remove the doubt because it is the 3rd time it has happened to me. And know if it happened to someone else. And under what circumstances.
In both team and 1v1 matches, the game mysteriously crashes on me. What is the problem? that is casually closed to me when it is a clear GG for the enemy and never when I am losing. And I would like to find out if it is a hack or cheat or something related, because it seems very coincidental to me that it closes when it is a clear victory.
From my point of view very suspicious.