Password-reset expired back to login missing on old expired links

Hello Guys,
I have a use case where I forced multiple reset-password emails from auth-0. The last email is valid and the remaining are expired as per behaviour from auth-0.
All is fine until now but the back to login button is missing for all older emails and I can see the back to login button only exists for the last expired email.
So the question is :
Is this valid behavior or we are missing something?

Please assist or let me know if you seek more information.

And another question can I also customize this screen as per my need?