Mobs that aren't from base resource pack can't play swimming animation

[ZilverLazarus]

Describe the Bug

When introducing a mob into a resource pack and making animations for it in Blockbench, the swimming animation doesn't work.

Reproduction Steps

1. Make a model with animations in Blockbench.
2. Integrate it into a JEMs resource pack.
3. Test in-game.

Expected Result

The mob should play the swimming animation but doesn't.

Screenshots and Videos

No response

Operating System

Windows 10

Mod Version

0.1.0

Minecraft Version

1.19.2

Forge Version

43.2.3

Other Mods

latest.log
The list of my mods are here at the end of this log.

Additional Context

No response

[SwanX1]

Which mob? Please provide more details.

[SwanX1]

Also provide your resource pack, please.

[Hellion-Games]

They interacted with me in Discord. They tested it on both Wither Skeleton and Llama. Neither worked, implying that the issue lies in the DefaultEntity predicate somehow. There were also no errors in the logs that I could see. But yes, the resource pack would be immensely helpful for troubleshooting!