Using Alt+Page Up/Down Fails Chrome

Since the last update I am no longer able to use the Alt+Page Up/Down to fill in the user and pass on the Chrome browser. Nothing has changed, have not added any new extensions, just flat out refuses to work. I checked the hot keys and they are still set to work but does not matter, they simply refuse to work. I have checked other browsers and it works just fine on them, just fails on Chrome. Any ideas why?