When fighting hand combat mobs, their attack distance is much greater than in Java Edition. This means that mobs are able to hit the player from 2 blocks higher.
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yes that bug report perfectly summarises, you can link this one as a duplicate

yes that bug report perfectly summarises, you can link this one as a duplicate
Please provide exact steps to reproduce the issue, or a video so that we can see what you are experiencing.
I suspect you may actually be experiencing desyncing between mobs’ visual position and their server-thread position. (MCPE-179969)