Email signup fails if you replace your registration tab with the validation email.

I just tried to register on a random public Element instance I stumbled across.

* I entered username, password & email (email was mandatory)
* It showed me the nice prompt and icon to go check my email for the validation token.
* I went to my email and saw the validation mail, and copied the validation link. I didn't click the link because that will open up in the wrong browser.
* I put the link in the right browser (the one I just used to register on)
* ...and got teleported back to the beginning of the registration flow, with it apparently having entirely failed to register me.

I instead expected the result of the validation link to take me into the app. Or worst case, complete the registration, and force me to log in again.