I rebuilt my Mac Pro software completely and it appears to have
resolved the idle hanging problem. It is alway an annoying amount of work getting everything up and running again. It’s nice to have everything fresh and clean and worth it to finally have a stable desktop. The most frustrating part of this kind of solution is that nothing is learned. How? Why? No answers, but at least an end to the frustration!
UPDATE! – Nothing is resolved! it just took over 48 hours for the problem to return. 😤
Silver lining was my brief use of screensavers and discovering John Coats work to bring the beautiful Aerial flyovers from the Apple TV to all macs. Looks amazing on 3 screens!