Back Button Disappears When I Play Audio

My app’s URL:

The back button disappears when I play the audio on a recipe on mobile. When I initially opened the app and scrolled through recipes and backed out, the back button worked fine.

But when I play a recipe, the back button then suddenly disappears when I click it for all the recipes I click into. The only way to go back from a recipe is to click the Home tab.

Then after I back out through the home tab, the other tabs become very glitchy when I click it. There is a lag when I click on other tabs.

Here is what is happening:

Can you fix this?

I couldn’t replicate this on Android. Which device/version are you using?