Summoning an Allay as a passenger to an entity and then giving it an item and dropping the item for it to pick up will cause the Allay to steer the entity at an abnormally fast speed that is inconsistent with its normal AI.
To reproduce:
/summon villager ~ ~ ~ {Passengers:[{id:"allay"}]}
- Give the allay some stone (not required to reproduce, but the villager seems to go far faster when the Allay is searching for items)
- Drop some stone
- The villager will move far faster than normal
- Testing on an axolotl results in it going so fast it makes huge circles around the dropped item