There's a problem when I use the cookbook on mobile, it's just pitch black and that's why it goes hard for me to play it without knowing what and how to actually prep for the customers. Tried toggling/adjusting some settings but the problem still remains, please dev check it quickly and give it a little fix.
If you're curious about my device, it's Oppo CPH1853 (Android 8.1 - Adreno).