Players or mobs can't push minecart when shulker is riding it

Probably caused by the hitbox of the Shulker which is bigger than the one of the Minecart, see MC-13937

But other minecart can push it.

But it is a related.

Can confirm in 20w48a. Feel free to use this command if you wish to reproduce this bug yourself.

/summon minecart ~ ~ ~ {Passengers:[{id:shulker}]}

Can confirm in 20w51a.

Affects 1.17

It still affects 1.17.1. The shulker can be moved if there is another minecart behind it. Cannot move shulker while in boat as well.

I am able to confirm this behavior in 21w38a. Here are some extra details regarding this problem.

The Bug:

Entities can't push shulkers riding in minecarts.

Steps to Reproduce:

• Summon a shulker that's riding in a minecart.

/summon minecraft:minecart ~3 ~ ~ {Passengers:[{id:"minecraft:shulker"}]}

• Attempt to push the minecart.

• → ❌  Notice how entities can't push shulkers riding in minecarts.

Expected Behavior:

The expected behavior would be that entities can push shulkers riding in minecarts.

Can confirm in 1.18.1.

Can confirm in 1.18.2 and 22w15a.