Grand Arena is Busted

Attached is a link to a screen recording I took of a recent Grand Arena match. In this video, you will see me do a whopping “-1” damage to Old Ben, who is Relic 5, with my also Relic 5 Bossk. What is going on??

Additionally, when I used Bossk’s Taunt, it seemed to replenish the Max Health that had been taken from me via Shatterpoint, but the next time I had Shatterpoint removed from me, I was back down to one bar of Max Health.

https://drive.google.com/file/d/1O3iRMEZFC54FEu64reSD7zYE8zSm3Tsk/view?usp=drivesdk