ressurected in an empty map

hello there, I am new to mapping, i had this random delirium map, where it was delirium from the start, i died once and resurrected normally at a check point, and continued farming the whole map, and left an abyss entrance behind for last, I went to the boss and died once, resurrected at the boss's check point, and the map turned normal,fully covered in fog, i killed the boss and went running around the map, nothing left, it was a completely empty map, not a single loot, and not even the abyss entrance, just an empty instance.

i tried relogging but nothing changed.

that was really fast, so it is a bug,i am so sad, but now i know what i shouldn't do, thank you for the answer