Halo 2 duel wielding not working.

Duel wielding doesn't work it seems. The game shows it at C key to duel wield when using the controller. Playing with 2 people in the steam deck when this happened. 

<img width="3072" height="4080" alt="Image" src="https://github.com/user-attachments/assets/be7e0e85-58f7-415d-a093-25e9f5dcae56" />