That’s an issue Ableton has confirmed. If you are on windows and use vst3, the preset change for Avenger, rapid and modwave is really slow. Most other vst3 don’t have these issues. I am also waiting a long time until Ableton will fix it.
I have more than 1000 vst3 and 95 percent runs very smooth with no issues.
Also modwave opens up in 2 seconds, it’s only the preset change, where Korg and Ableton are aware