Falling blocks such as Sand, gravel, anvil, etc.
Have a very choppy animation.
This was fixed in 1.18.10,
But it's back on 1.18.30,
This might be due to the 1.18.30 changelog:
"All falling blocks once again have a full-block hitbox"
This is different from: MCPE-142010
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Confirmed in 1.19.60 on Windows. As the sand blocks in this video hit the ground they appear to teleport back up by a block.
[media]
This may be cause by MCPE-123321 / MCPE-166739 where the client-side movement animation for falling entities is highly inaccurate. In the case of falling blocks, the teleporting back up may be because the block lands client-side before it lands server-side, and then it teleports to try to re-sync.