I got back with the user several weeks later and it fixed itself with a Edge update. I had suspected it being a browser issue since it uses the built in browser window during the authentication which I believe is just edge with a cisco border. Someth...

Having this issue on windows 10 with a few users, cleared and reset all web browsers, uninstalled and removed all AnyConnect traces, reinstalled, and still have the issue. Only workaround  I have is so install versions prior to 4.10.5xxxx. but that g...