Zombified Piglin Entity File does not load

When loading a resource pack that modifies the client entity file for the zombified piglin / zombie_pigman, the entity file does not load.

Steps to reproduce:

1. Load the attached mcpack and apply it to a world in 1.21.130

2. Summon a zombified piglin via spawn egg

Expected Result:

The zombified piglin gets scaled up by a factor of 3 since the scale is set in the entity file

Observed Result:

The zombified piglin looks unchanged, changes in the client entity file are not observed in-game, This applies to any change, including other textures etc.

For reference, the pack also includes a regular piglin with the same scale change made to the entity file, and here it works correctly