Here's how they appear in REI however they appear that way in block form as well

Using a custom resource pack
Unity 1.16.X Fabric.zip

Thanks a lot for the report, will be fixed in the next release! For now, the solution is to restart the game after switching texture packs.
Nice textures by the way, where did you find them?

Oh thanks, those are mine stylized like Unity.

Oh ok, very cool! You may want to fix that when you stack double ingots, the stack count and the 2 on the texture conflict. ;-)