I think I have the same problem, it started today for me.
- Playing normally. No lag, no ping spikes.
- Game suddenly stops moving, no sound, no movement.
- Brief black screen.
- Map loading screen appears, overwatch logo shows it’s loading.
- Game loads back. Same game, same spot I was in when the game stopped.
Happens about twice in a 10-15m game. Has not happened to me before today, although I didn’t play yesterday.