Entities with passengers do not collide with eachother

The issue:

• Entities with any passenger do not collide with each other.

• Entities with a passenger can collide with any entity without passengers.

• Entities ridden by a player can still collide with other entities with passengers.

• This behavior seems to occur in all entities, however I noticed it most in sulfur cubes, as their regular behavior is to bounce off of each other but this no longer happens when they have passengers.

Steps to reproduce the issue:

• Summon two or more entities with passengers. (Example command below)

  /summon sulfur_cube ~ ~ ~ {Passengers:[{id:"minecraft:armor_stand"}],equipment:{body:{id:"minecraft:blue_ice",count:1}}}

• Push, hit, or lure the entities into each other.

Expected result:

• Entities will collide with normal behavior, pushing each other around.

• Sulfur cubes will push or bounce off of each other.

Actual result:

• Entities do not collide or interfere with each other’s movement in any way.