UT rivals matchmaking issue

I am writing to report a persistent and frustrating matchmaking bug in Rivals mode that severely impacts my competitive experience.

My matchmaking preference is strictly set to Solo (Single Player). However, the system consistently violates this setting and forces me to play against Co-op (duo) teams.

This issue creates an unfair disadvantage and completely ruins the balance of the match, as competing alone against two coordinated players undermines the core competitive integrity of the Rivals mode.