Pokemon sword slower with multicore

I just noticed that pkmn sword runs slower in my pc with multicore on. When the character starts moving fast but then suddenly slower. Could anyone give me an explanation about this?
I use Yuzu EA 567

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

Update to the latest version with the installer.

Could you also give tips on how to improve fps on PKMN Sword?

Enable ASYNC in the bottom left, and if you have an Nvidia GPU, follow this video: https://www.youtube.com/watch?v=omRFhicsLw0&t=978s

The ASYNC is always on and I also use Intel UHD 610 graphics driver