Acrobat Rhythmically Lagging

I have the whole CC suite. I use Photoshop and Illustrator regularly on this relatively new, powerful Windows 10 machine with no problem.

But when I try to edit (or even open) an existing PDF in Acrobat, it usually freezes up, the "wait" pointer or "busy" pointer, for ten to sixty seconds, then goes back to standard pointer for just a second or three, then back to the wait or busy for another long period, back and forth.

I can sometimes actually do something quick, like click to select or insert, for the seconds it's the normal pointer, but often cannot.

It will do this for five or ten minutes, then eventually will start behaving normally, and I can use it.

This is a real problem when I'm needing to get something done for a client in a timely fashion.

• Rebooting doesn't help.
• It's the latest version of Acrobat (According to CC).
• My machine has 32 gigs of RAM, a 12th gen i5-12600K that handles Photoshop just fine, and is booted on an SSD.
• It happens with small or large PDFs

Any ideas?