[fixed/closed]Stonybrook Schoolmaster token mandatory

[Nexhro]

Describe the Bug:
When Stonybrook Schoolmaster becomes tapped, its controller puts a 1/1 blue Merfolk creature token onto the battlefield.

Which card did behave improperly ?
Stonybrook Schoolmaster

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
JOU v1, duel

What exactly should be the correct behavior/interaction ?
When Stonybrook Schoolmaster becomes tapped, its controller may put a 1/1 blue Merfolk creature token onto the battlefield.

Are any other cards possibly affected by this bug ?
-

[Gargaroz]

Fixed in 3c20ac0