i just witnessed something really strange, i dont know if it was caused by lagg or what, i was just exploring my world for the first time and i watched as a zombie spawner dungeon filled with sand one by one, the sand started filling from the top so it would fall to the bottom filling the whole dungeon, can someone check this out, the seed is : 68513344
the coods are : x326 , y 65 ,z-280

Not odd at all actually. It's one of the most common things in Minecraft. Sand is one of the blocks effected by gravity. Something caused a block update which would have caused the sand to fall.

oh ok i forgot about block updates

dude its a suface dungeon, in the desert biome there are common but i found one i forgot the seed but mine was NOT in a desert biome ?

so my ruomor begins

Surface dungeons are neither more nor less common in deserts than they are in other biomes. They're just easier to find in deserts because a collapsing sand floor is a pretty good hint. I've encountered surface dungeons in almost all biomes so far, maybe with the exception of ocean and mushroom biomes.

Quote from Straight_Down

Surface dungeons are neither more nor less common in deserts than they are in other biomes. They're just easier to find in deserts because a collapsing sand floor is a pretty good hint. I've encountered surface dungeons in almost all biomes so far, maybe with the exception of ocean and mushroom biomes.

They are in any biome! Found a cool one in a mushroom biome once.