Bug Report: "Spell Queller" Opponent Cast Spell I Own
Hello,
I just played a game in which my opponent resolved a Tibalt, Cosmic Impostor and used his -3 ability to exile a Brazen Borrower that I both owned and controlled. Then he cast the Petty Theft side of the stolen card with Tibalt's emblem and it correctly went to his Adventure Zone. Later, he cast the same Borrower from the AZ and I responded with Spell Queller tucking the Borrower that I owned but he cast under my spell queller. Later, that spell queller was returned to my hand with Otawara, Soaring City. The expected rules interaction would allow me (the owner of the spell quelled Borrower) to cast either Petty Theft or Brazen Borrower off of Spell Quller's leaves the battlefield ability. Instead, my opponent was allowed to cast the Borrower instead despite not owning the spell/card (as spell queller states).
Steps to reproduce bug:
Player 1: Cast Tibalt Cosmic Impostor and exile a Brazen Borrower owned and controlled by Player 2.
Player 1: Cast the stolen Petty Theft on something controlled by Player 2. Brazen Borrower will be sent to Player 1's Adventure zone (as intended).
Player 1: Cast Brazen Borrower from the Adventure zone.
Player 2: Cast Spell Queller targeting the Brazen Borrower on the stack (that you own). Resolve this ability.
Player 1: Remove Spell Queller from the battlefield.
Bug will now happen and allow Player 1 to cast the Borrower owned by Player 2
This bug happened while I was playing on my iPad, however, the nature of the bug suggests it is to do with the coding of the interaction/adventure zone and not my console.