Thanks, reddit team, for fixing this. Both the new OPEN button anchored to the top, and the new bottom sheet work as desired now. My comment above was about a

Thanks, reddit team, for fixing this. Both the new OPEN button anchored to the top, and the new bottom sheet work as desired now. My comment above was about a previous version of the "open in app" bottom sheet from a previous version of the mobile website. Both mobile safari on iOS.