Unexplainable competitive glitch

I’ve been having a glitch in competitive when i ONLY play support, where it doesn’t show both team’s players properly, they end up a shining orb with the color of my team or the enemies, some are still visible but most not at all, cant see my UI (as in zen’s orbs) at all with some heroes, after i die and come back in spawn for a few seconds my screen goes black, and i disconnect and lag alot.
it doesn’t happen in custom games, quick play, stadium, arcade, you name it, only in competitive.
i need an answer for this bug i cannot do anything on support because of it.
if i could i will share a video