In Java Edition, Buried Treasure always generates with blocks around it. But in Bedrock Edition, "Buried" Treasure can generate floating in the air, water or lava.

How to reproduce:

Use the Seed:193224703405482

/tp 2440 6 -1000

/tp 2455 -17 -890

/tp 2391 8 -1016

/tp 2440 6 -1066

/tp 2502 -58 -1000

And take note as to whether or not the treasure chests are generated floating in air, water or lava.

Observed result:

They are floating in the air, water or lava.

Expected result:

They are buried in solid blocks.

Notes:

Relates to MCPE-172251. (Here is a plains biome)