Hack or Exploit on Battlegrounds

I was #1 in a match a few minutes ago and I played against one user who was #2. All other players had already died.
Every time I won against this player I dealt 0 damage. I kept playing against him dealing no damage until I ended up losing the game (His damage actually counted for me). It was very frustrating.
Screenshot: imgur com/rb4R85S

This might be a stupid question, but you absolutely won those fights right? It also shows 0 damage if you tie.

I won all of those shown in the image. In game his health went from 13 to 2 with the attack at the end of t he match. At the start of next match it went back to 13 and I got him to 5 or something.

Just had this too… ….