The melee attack reach of the mob sitting on the simulated object is incorrect.

[Chuzume]

Description

Mobs sitting on objects in the simulation will attack you even from a distance.

I have confirmed that there is no problem when they are sitting on non-physical objects.

https://www.youtube.com/watch?v=vWbSBJAxh6Y

Game Log

https://mclo.gs/SWs5EJ1