Disturbing suspensions

During gameplay, a sudden freeze occurs, often with no image, similar to a Lockstep connection, but without the video. This is especially disturbing in HC mode !

Fu... do something with this ! I just exiled mercenary and get suspension of game. After about 10 second game back but screen was black. What I saw was the red bar of exile's life on screen !

Strange but after game back the area that was uncovered is now hidden !