Zombies with their "CanBreakDoors" tag set to "1b" cannot break doors whilst riding chickens

The Bug:

Zombies with their "CanBreakDoors" tag set to "1b" cannot break doors whilst riding chickens.

Steps to Reproduce:

• Ensure that the "mobGriefing" gamerule is set to "true" and the difficulty is set to "hard".

• /gamerule mobGriefing true
  /difficulty hard

• Build the setup as shown in the attachment below. setup.png
• Summon a zombie riding a chicken on the diamond block that has the ability to break doors.

• /summon minecraft:chicken ~ ~ ~ {Passengers:[{id:"minecraft:zombie",CanBreakDoors:1b,IsBaby:1b}]}

• Stand on the other side of the door opposite the zombie.
• Switch into survival mode and get the zombie to notice your presence, so that it approaches the door.
• Wait a couple of seconds whilst it stands at the door.
• Take note as to whether or not zombies with their "CanBreakDoors" tag set to "1b" can break doors whilst riding chickens.

Observed Behavior:

Zombies with their "CanBreakDoors" tag set to "1b" cannot break doors whilst riding chickens.

Expected Behavior:

Zombies with their "CanBreakDoors" tag set to "1b" would be able to break doors whilst riding chickens.