"Duel Tower" card effect bug

  1. Bug description
    Its “At the start of the battlephase” effect is Optional, according to OCG rulings.
    Card Rulings:Duel Tower - Yugipedia - Yu-Gi-Oh! wiki

  2. Bug reproduction steps

    a)Play the card “Duel Tower”.
    b)Go to battle phase
    c)Here, monster selection will pop up, but there is no pop-up beforehand asking you if you wanted to banish a card face-down at all. I don’t even know if it works properly for the opponent either since i dont have a partner to confirm.

    Spoiler

    your replay code

  3. Screenshot OR error code

  4. Expected behavior
    There should be a pop-up beforehand asking you if you wanted to banish a card face-down at the start of the battle phase during effect resolution.

  5. What OS are you using
    Windows-10