Describe the issue

• When the item/inventory model of a mob head (I've been using Skeleton as an example) is rendered, the game instantly crashes.
• I have tried this with both a finished model from somebody else's pack and one I created in Blockbench and didn't edit what so ever.
• I have tried this while only keeping Entity Texture Features and Entity Model Features enabled.

Crash log

• Here is the error message thrown out by the launcher after the crash happens.

Beginning
The game crashed whilst rendering item
Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.class_1921.method_24296()" because "$$0" is null
End

Your setup: (please complete the following information):

• Minecraft version: 1.20.1
• ModLoader: Quilt
• ETF Version: 5.0
• Link to testing pack used, including Blockbench project file

should be fixed in 5.1 - not yet released