Game Mode: Standard Ranked

Steps to Reproduce (This issue does not occur consistently and may be intermittent):

1. I selected a deck and clicked Play to start matchmaking.
2. Within the first few seconds of searching for an opponent, I changed my mind and clicked Cancel because I wanted to use a different deck.
3. A few minutes later, I selected a different deck and clicked Play again.
4. I entered a match with an opponent, but it appears that the previous matchmaking session, which I had cancelled, had also resulted in a ranked game using the deck I had originally cancelled.

Actual Result:
My opponent in the previously cancelled match was AFK, and I was awarded a win for that game. However, my opponent lost a ranked game because the match started despite me having cancelled matchmaking.

Expected Result:
Clicking Cancel should completely cancel the matchmaking process and prevent the cancelled search from resulting in a match afterward.

This is unfair because my opponent lost a ranked game that should never have taken place in the first place.
Please investigate this issue and fix the matchmaking cancellation process to prevent this from happening again.