When killing the final boss of the Naruna Hot Spring Dungeon whilst in the colourful ground phase the loot drops and you are immediately sent into a cutscene at teleported back to the original fighting area. This makes the loot unreachable. This happened to me on hard mode - I reran the dungeon and it didn’t drop the bonus chest, I assume due to it thinking I have already obtained it.
Really frustrating as these rewards are quite important for progression…
If a reward reset is possible so I can run the dungeon again and wait until it teleports back please let me know.