VST audio stutters, changes volume, and parameters when opening/closing vst's

Had to reinstall my OSX and I did a fresh install of Cubase Pro 15 on my Macbook Pro m2 Max. Having a nightmare here as all of a sudden when I open/close vst’s, the audio from the vst stutters, or stops, or Kontakt’s volume decides to go down. Or the the xy pad changes itself.

Also, when I click on another track and back into that track, it changes the sound as it looks like vst parameters were changed .

I mean crazy stuff here, just by me closing that instant of the plugin. It does this on all plugins. Has anybody experienced this before?

The CPU usage is good as I only have a few tracks in my project template.

Hi,

To me it sounds like a MIDI loopback. Some MIDI Device sends unwanted data.

What kind of (MIDI) Remote Devices do you use?