So I was playing minetest 4.13 on my android tablet (lenovo) with the mods, mobs redo and 3Dtorches enabled.
As the title says, I found a Dungeon in mid air. Also I have problems with random rectangular shaped chunks of gras floating in mid air. I have screenshots but don't know how to post them, I will if someone tells me how. Anyways the seed is 1071287371358619288 and coordinates are 71.3, 23.5, 348.31 (looking north). I think this counts as a bug, hence why i' m posting here.