Texture pack changing glitch

When i go to change texture packs, It either doesn't change or only certain items will change, sometimes chest do, sometimes wooden planks do. I found this bug when switching from Default to Dokucraft 1.7, and from Dokucraft to faithful. The screenshot is of me using faithful but it says dokucraft at the bottom. I dont have a screenshot of the glitch in action as when i went to open minecraft again and change texture pack to activate the glitch, it wouln't change at all.