This has been happening to me and some of my friends too. Not common during 1v1 games, but quite annoyingly frequent in team games.
The game doesn’t crash. It just gets stuck. I can’t chat/pause or make anything work within the game. I don’t drop until I quit. It’s not completely frozen because I can still click units/buildings and other buttons within the game, but nothing happens. I do hear the sounds when I click on something.
When I quit the game, I get out of the game normally and that’s when everyone else sees that I resigned.
I thought it was a rare issue but some of us have been noticing this quite regularly now.