I lost 47 experience levels along with all my inventory due to an underwater bug

I just lost 47 experience levels along with all my inventory due to an underwater bug. I was on a boat until I saw a gigantic cube under water literally without water and as I had never seen anything like this I stopped to go and see what it was. Enter him and having no water inside I fell into the bottomless abyss where I died and lost everything. I went back to the place and there was neither the Bug nor my inventory, there was nothing.