Logging into Manage My Apple ID Account fails unless I manually enter ID

When I go to the Manage My Apple ID Account page (https://appleid.apple.com/#!&page=signin), by default a drop-down dialog box appears with my Apple ID, along with a button that says Continue with Password as well as a link that says Use a different Apple ID.

I click on the Continue with Password button (arrow 1 in screenshot) and then enter my password. It fails EVERY SINGLE TIME! The dialog box simply "shakes" a little bit, then returns, prompting me to reenter my password.

When I cancel, it returns me to the original drop-down dialog box. I then click on the Use a different Apple ID link (arrow 2 in initial screenshot) . The drop-down dialog box disappears and in the center of the main webpage (not a dialog box), is a prompt for my ID and password.

I enter my Apple ID (the exact same one that previously appeared in the drop-down dialog box) and then my password. I then get a two-factor authentication prompt, which I enter. And VOILA, I get in, EVERY SINGLE TIME.

Clearly, this is not a big problem as I can work around it. But it is very annoying. I don't log into my Manage My Apple ID account very often, thus I usually fail to log in once or twice, before I remember that I need to cancel and manually "Use a different ID" (but of course, using the SAME ID).

Anybody else seeing this? Any thoughts?