Brad has chimed in over there and is going to take a look at my logs tonight - FYI. I would start following so that you can stay updated if my situation improves.
I can tell you that phone support told me the reason that “Update Wifi settings” was grayed out in the new app is that it is only meant to update wifi settings for devices/appliances that connect to the network. Why on earth it doesn’t apply to the actual smartthings hub is beyond me. They told me my only options was a hard reset. I said no thanks as I have about a hundred devices and 20 smartapps and no interest in redoing it all… I’ll leave it plugged in with ethernet for now.
I’ve been with smartthings for 3 years now and love so much about it but they’re kind of getting one upped these days by decent and fresh products. Hubitat to name one. Please ST, don’t let us down!