So im using the Minecraft texture pack chroma hills HD, but it doesent have the new textures for the Nether update yet. So I want to fill the gap by using a secound texturepack (hattoricraft) which has textures for all the new Blocks.

The problem is when im using this two texturepacks on my realm, the chroma hills textures doesent overwrite the hattoricraft textures.

I did a copy od the realm on a offline world and there is everything like it should be. Both have the same settings.

You can see the netherite pickaxe im holding on both picktures. The ...416.png shows the offline world and how it should look like. Chroma hills as main textures and hattoricraft to fill the rest of mit updatet blocks and items. 

The ...747.png shows how it looks like in the realm.

Ist only showing all textures from hattoricraft. None from chroma hills.

I also tested it with another texturepack combination, (hattoricraft and Zig Zag (which also doesent include the Nether update blocks and items)).

Same issue there.