Fix WebView Display Issue in Expo App

I'm experiencing a display issue in my app, built on Expo, which uses WebView. After a specific action (button click), an element becomes invisible. This issue needs to be diagnosed and fixed urgently.

Ideal Skills:
- Extensive experience with Expo and WebView
- Proficient in debugging display issues in mobile apps
- Strong understanding of JavaScript and React Native

Please provide examples of similar issues you've resolved in the past.