Bro-mon Lag(Please fix)

I just got a lag. . . so I was using FirewallFenrir agains an uncommon monster but SOMEHOW the monster dealt 51 damage, and even though I had one hp left, (Which just somehow turned into two because you know sometimes in your monsters the health does NOT heal after the battle and I have no idea why it just duplicated YES I REMEMBER CORRECTLY), I still lost the battle. Please fix this bug

Bruh the 2 just turned into a 3

You know the pattern. . . It turned into a 4
I’m a new bro-mon user, does anyone know if this health regenerating is normal?

But this into the bug category then I will figure something out

Alright

Proof that FirewallFenrir is the strongest bro-mon:

Dealt 51 damage