please make sure you are using the latest ETF version before submitting an issue, you might also find a dev build
fixing this issue already on my discord https://discord.com/invite/rURmwrzUcz in the #dev-blog channel

Describe the issue

If a resource pack with hundreds of random textures is loaded and the corresponding mob (fox in this resource pack) is chunkloaded, the game freezes for a few seconds.
Resourcepack: s3KmGv0.65a.6510047.zip

Your setup: (please complete the following information):

• Minecraft version: 1.21
• ModLoader: fabric
• ETF Version 6.2.8 + EMF 2.2.6
• Does the issue persist with only ETF installed? - yes
• Have you checked the FAQ in the Readme, or Discord, to see if it is a known issue? - yes