The Bug:

Sniffers play their walking animations after the "NoAI" NBT tag is applied to them.

Steps to Reproduce:

1. Summon a sniffer through the use of a spawn egg.
2. Alter its NBT data to make it have NoAI by using the command provided below.

   /data merge entity @e[type=minecraft:sniffer,limit=1,sort=nearest] {NoAI:1b}

3. Attack the sniffer and watch it closely.
4. Take note as to whether or not sniffers play their walking animations after the "NoAI" NBT tag is applied to them.

Observed Behavior:

Sniffers play their walking animations after the "NoAI" NBT tag is applied to them.

Expected Behavior:

Sniffers would not play their walking animations after the "NoAI" NBT tag is applied to them.