Observed Results:
A small percentage of Zombified Piglins (both adult and baby) spawn in a state where they are completely unable to enter any rideable entities, such as Boats and Minecarts. This is a persistent state that can be saved and re-loaded via Structure Blocks. Other mobs do not exhibit this issue.
Expected Results:
All Zombified Piglins should be able to enter vehicles.
Steps to Reproduce:
Set up a Command Block to repeatedly spawn Zombified Piglins in a 1x1 space.
Place an Activator Rail and a Minecart directly above the spawn point.
Power the rail to make the Minecart vibrate.
Normal Piglins will be picked up and ejected to the corner, but Bugged Piglins will remain at the spawn point, ignoring the vehicle.
Save the bugged Piglin with a Structure Block and reload it; the behavior persists.
PS:The other video shows the Preview version. It uses a different method to demonstrate the bug, confirming that the issue also exists in the Preview version.