When falling on the edge of any block, not the particles of the block on which the player stands appear, but the object over which the player stands on the edge of the block. There are particles of even non-solid objects(flowers, redstone, etc.). If there is a Bed under the player when falling on the edge of the block, then he will jump up as if falling not on the edge of the block but on the bed itself. And if there is a pointed dripstone under the player when falling on the edge of the block, then he will receive damage as when falling on the pointed dripstone itself. Also, if you jump on the edge of the block over the pointed dripstone, the player will receive damage. In this way, the player interacts with objects that he should not interact with.

Link to the video with this bug: https://youtu.be/U-sAhY2F8gQ