Died to cenotes map boss with a portal remaining and the whole map regenerated without monsters

So i was doing Cenotes map, I beelined to the boss killing all monsters on the way but I'm pretty sure not all the monsters in the map. I died to the boss with 2 portals remaining. When I went back to the checkpoint the whole map became undiscovered. I fought boss again and then explored the map again but the whole layout was different and it was completely empty. No loot on the ground anywhere, no chests, no monster, only another checkpoint was left.

If you decide to rush to the Map Boss without interacting with any of the other Map content and then die, you will respawn at the Boss checkpoint and only the Map Boss will be present. All of the other monsters and content will be removed. This is to prevent cases where players would be able to farm multiple copies of the same rewards by dying on purpose.