On the mobile view of Flarum, swiping left on a discussion will open the discussion options menu. Choosing delete, and then performing the swipe left option again will hide the discussion from view (the display block remains, though empty) and fail to bring up the discussion options again.
I haven't experienced this with any option other than delete.
Confirmed
This issue needs the mobile label (and maybe UX).
Confirmed on beta 8 (current discuss version).
Most helpful comment
Confirmed