Thanks, Pope. Using your nomenclature:
“UNDOCK CRASH” - so far we see this almost exclusively on 64-bit Mac clients and are investigating further with that it mind.
“BLACK DEATH WINDOW” - this is not Mac specific, but seems related to post processing (the reason Performance Mode works around it is by disabling some elements of the feature) a fix is underway.
“BLACK SUB WINDOWS” - this is the first report I’ve seen of that, and I haven’t seen it on my own High Sierra machine (significantly older and less beefy that your machine). Will look for additional info in existing bug reports.