Avid MC 2021.09 and Continuum 2022 issues


I’m having constant crashes, playback issues using BCC Continuum on my Avid machine. Is it my machine setup or something else, any any help will be enormously welcome.

Mac Pro late 2013 (trash can)
3,5 GHz 6-Core Intel Xeon E5
64 GB 1866 MHz DDR3
AMD FirePro D500 3GB
macOS Catalina Version 10.15.7

Avid MC 2021.09

I’m mainly using Primatte Studio and love the mocha tool. I also use Particles Systems with the clouds preset to create fog. But the crashes are debilitating. I have trashed plists, mc states, settings and whatnot over and over. I have created new projects, new bins, new everything, I have tried to not throw an effect on a filler on the top track which seems to also cause issues. But to no avail. I would assume I have to render every time I do something with these effects which is not an issue but it is impossible to use it seems with more than 1 BCC effect on a clip or stacked on 2 to 3 layers.
Without being able to use Primatte Studio or any of the very nice key and blend effects will be very unfortunate since it speeds up matting and tracking enormously.

Anyone else has similar issues?