FortrezZ MIMO 2 ~ Cannot contact device, error code: 32

I use two FortrezZ MIMO 2’s as a relays to control my four-speed pool pump. There’s two relays on each MIMO making a total of four relays. After this latest f/w update one MIMO 2 = 2 relays quit responding, then it showed back up as a couple of devices called _Appliance Module. I renamed them back to what they previously were and reprogrammed all my scenes using these devices. All was well until recently when both fell off he network but then one came back. Now I have one still not responding, the one that controls my 3000 RPM pump speed.

How to fix?

Why is it that every f/w upgrade makes a mess of things?