The Bug:

Relates to MC-696, but is better described by MC-51875.

A wolf summoned with the Sitting value set to 1b can move around as if it were not sitting. Retriving the entity data after the wolf after it has been summoned still shows the Sitting value as 1b, meaning it is not a visual bug.

Steps to Reproduce:

1. Summon a wolf with the following command:

   /summon wolf ~ ~ ~ {Sitting:1b} 

   The wolf can run around like normally.

Observed Behavior:

A wolf summoned with the Sitting value set to 1b is able to move around as if it were not sitting.

Expected Behavior:

A wolf summoned with the Sitting value set to 1b remains sitting.