Thanks. I've done some googling and have found many threads on reddit, etc., w/folks having the same issue in Chrome and other browsers, so at least I have a lot of company.
If I clear cache on Chrome it works for a while and then gets stuck again at some point. However, Firefox works w/out issue so I'll just keep a FF window open w/the web control up and do it from there. I have to move on to much more important things like setting up vlan tagging on a new managed switch I got yesterday. ;-)