This is like the 3rd or 4th post i've seen with this issue (i'm dealing with it myself) and it seems AMD isnt interested in fixing it as this issue has persisted through a recent update with no fix.
If you bothered to look at the OPs screen shot, the login pop-up doesn't have an address bar. Your "fix" isn't a fix because it's a work around and only works for some people. Mine is like the OPs and the pop up doesn't have an address bar.