Kingdom Hearts gets laggy/slow motion

[PS2Linx]

Hi the case it’s the game gets a bit laggy/slow motion  when I’m at coluseum Tournament(Hercules Cup) and  the fight gets very intensive(by the I’ve won the Hercules Cup) .Can you give a hand or help of what settings do you recommend me to use to run the game smooth?
OS: Manjaro Linux v17.1.10
Kernel: 4.17.0-2
Mesa: 18.1.1 /AMDGPU Open Source Driver
CPU: I7-4790 3,6Ghz
GPU: ROG STRIX RX 480 8GB
RAM: 32GB
OpenGL(Hardware) Set as render