Grand Arena Championship Crash and Sign up Issues

Having the same issue with the crashes and glitching, but only against my current opponent. No issues in round 1 or 2.

Glitching - All of my attacks cause the game to stutter, essentially looking like its moving at 0.1x speed, maybe even less, but the counter doesnt reflect the speed. Quite off putting and causes mistakes to be made in the battle.

Crashing - Game will crash in the middle of a battle, all except the first battle that was glitching/stuttering. Basically lost my teams and my opponent having revan I now have no counters and have lost the round as a result. 

Experiencing no other problems in any other areas of the game, only when initiating a battle with this opponent.

In game info:

Tag: KingGilga

Ally Code: 122-763-321

Device: Android - Samsung Galaxy S9+ playing through Wi-Fi