Summoned warden with NBT instantly digs down

The bug

Summoned warden with NBT instantly digs down.

To reproduce

• Summon a warden using the command /summon warden ~ ~ ~.
• The warden wanders around.
• Summon a warden using the command /summon warden ~ ~ ~ {PersistenceRequired:1b}{}.

Observed result

The warden instantly digs down.

Workaround

Add the following NBT to the /summon command:

Brain:{memories:{"minecraft:dig_cooldown":{value: {}, ttl: 1200L}}}

For example:

/summon warden ~ ~ ~ {Silent:1b,PersistenceRequired:1b,Brain:{memories:{"minecraft:dig_cooldown":{value: {}, ttl: 1200L}}}}