Same issue here.
Pretty annoying huh?
It occurs on every game mode / mod I have tried (Breaking Point, King of the Hill, even singleplayer missions) I have tried almost everything to fix this. Uninstalling-re-installing different versions of drivers, changing resolution, fov, whatever. Never had this with earlier ARMA3 versions.
My PC specs
i7 4770K
GTX 970
8 GB
Lol as a first day member I cant post links so enjoy copy pasting the youtube link - fixed.