Bug found.
Jumped into halo infinite flight after playing in first flight. Set up custom controller input in first flight. Loaded into this flight. Y button on controller was set to swap weapon as default with other custom button mapping. In halo game and menus, Y button didn’t respond at all. Works in xbox dashboard. Loaded into and out of matches, no Y button use at all. All other inputs worked fine.
Solution: reset button mapping to default then Loaded into match, confirmed working, then changed back to custom layout. Works still. Then deleted flight and redownloaded. Loaded in, custom was still set to layout for controller. Y button didn’t respond in game again.
Hope this helps.