Second layer of armor not rendering

The second layer of armor textures is not rendering in snapshot 25w31a. Everything renders as expected in 1.21.8.

I have attached screenshots of the issue with signs indicating the game version. This is most noticeable with a resource pack that makes extensive use of the second layers, but it’s also noticeable with no resource pack in the hips of all leggings. I’ve included both scenarios to show the extent of the issue.