May relate to MCPE-143895.

The bug

Despite noise caves generating in largely the same positions in Java Edition as they do in Bedrock Edition (if not identically), the position of traditional carvers still differs even on the same seed.

While some generation disparities may still be expected between editions (such as configured features, which are unstable between different versions on the same edition anyway), carvers are a stable enough feature such that consistency between editions would be expected, however this is not the case.

How to reproduce

Having both editions and a keen eye would reveal this for any seed.

I've specifically tested this with the seed 107038380838084 due to its iconic cave systems which make their presence known rather quickly (MC-111378). At the coordinates -137, 68, 34, a section of cave exists in Java Edition which is completely absent in Bedrock Edition. Turning 180 degrees from it and wandering away from it reveals a small noise cave opening that can be seen in both editions and appears to be shaped identically.

Expected results

Carvers would appear in the same places in both the Java and Bedrock editions, just like noise caves are.

Actual results

Their positions are completely different.