GarageBand system overload with miroslav plugin on MacBook M1 Pro

I have a Macbook M1 pro with 32 GB Memory, running sequoia.

I get a system overload with just a couple of Tracks running a Miroslav Plugin.

I checked my Activity monitor and it says it still has about 70 percent idle.

Any ideas ?

[Re-Titled by Moderator]

Original Title: Garageband System Overload