Since version 1.3, the walking animation no longer continuously plays when an entity repeatedly takes damage

When an entity takes damage, it triggers the walking animation. In version Alpha v1.2.0_02, a feature was introduced where this walking animation played continuously/smoothly instead of every second when the entity was in fire, lava, or on a cactus (which attempt to deal damage every tick). However, as of version 1.3, the walking animation now only plays every half second, just like before Alpha v1.2.0_02. This change is likely due to the server-client split introduced in version 12w18a, as the animation didn’t play continuously/smoothly in multiplayer even before 1.3.

Steps to reproduce

1. Start version 1.2.5
2. Spawn a mob on a cactus
3. Start the newest version
4. Spawn a mob on a cactus again

Observed Result: The walking animation no longer plays continuously as it did before version 1.3.
Expected Result: The walking animation should still play continuously.

The core issue appears to be that if the game fails to deal damage to an entity due to the damage cooldown, it no longer triggers the walking animation as it did before version 1.3.