With 3.4-418, crabs despawn when I go to far away, is that intended or bug?
When I breed two crabs from bucket and went far away, then only baby have despawned.
latest.log

This still happens on 1.20.1, and furthermore, if you put a baby crab on a bucket, it will instantly grow.
The talks in discord suggested this was a bug so I'm documenting it here.