Can’t even play ranked

Literally game just freezes up, happens fairly random but my past three ranked games I’ve lost 45rp a piece due to my game screen bugging out and freezing (normally when using a heal/ultimate accelerator) when my screen unfreezes I’m either knocked or eliminated. 135 rp down the drain.
First game was the beginning of my fight who know what would happen 

second game was two knocked on each team I was in the middle of a mirage rez, and it froze 

third time I was mid fight with one knocked on my team hitting a shield bat (in the open I play mirage) and when it came back the whole squad was knock.