Axolotl walking animation stutters when moving slowly

The bug

Axolotl walking animation stutters when it is moving slowly. This also affects axolotls summoned with a low movement speed attribute.

To reproduce

1. Summon an axolotl.
2. Leash it or splash it with a Slowness IV potion.

Expected result

The walking animation would play normally, scaled by the axolotl's speed.

Observed result

The walking animation stutters.