Could KM be intermittently freezing on Catalina?

I have an issue on a 2013 Mac Pro which I am trying to isolate.

After upgrade to Catalina, periodically the system freezes for 10 seconds at a time and is not responsive to the mouse.. then all goes back to normal. This happens maybe every 20 minutes or so.

I am not certain yet but I think it happens only when KM is active and does not happen when I quit KM. Has anyone else experienced anything similar?

It seems also to occur when I go to System Preferences - so it may not be related to KM.

You may find some help here:

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