Hello,
Thank you for making a bug report.
I’d like to welcome you to the forums and let you know about the #rulings channel in the Duelist Unite Discord server. If you are not a member, please feel free to join! You can ask about rulings such as this as it is a fairly common ruling.
This is working as intended. Card that “Must be special summoned” are required to be summoned by their condition first, before they are eligable to be summoned by other card effects, even if they ignore summoning conditions. It just means that you are no longer required to perform the same tributes to summon it.
You can read this post that explains further.
If you have any other questions, please feel free to let us know.