When using a resource pack on mobile (in this example, the plastic and city packs) the Furnace UI is not rendered correctly and the default UI is displayed st thr top, causing text and icons in thr menu bar to be unreadable, particularly the close button. This is also visually annoying but mainly causes text rendering issues.
Linked issues
duplicates 1
Attachments
Comments 6

That is just how the texture.pack does it, it's not a bug, but it could be a bug with the Texture Pack.
These are both Mojang/Microsoft created packs from the store, I'm not sure hoe to upload them, that's why I've reported it here. These aren't packs I've downloaded from they Internet but instead ones I have bought from the store.