Huh…interesting…I just tried with my same number and it didn’t prompt for my key…unexpected. Let me see why this is the case. I also wonder who at dfinity is responsible for deploying candid ui. Maybe it hasn’t been updated in a while? Or maybe they want you to use that url now?
Edit: Ok…I can confirm that at some point they started using two different domains for safety:
I’d advise setting up keys at both domains in case one ever gets added to the black list again.