A. 1. Check your internet connection: Ensure you have a stable internet connection, as a weak connection can cause the chat box to disappear. 2. Toggle the chat visibility: Tap on the chat icon to toggle it off and on again. This can refresh the chat box. 3. Update the app: Make sure you are using the latest version of Twitch, as updates often fix bugs related to UI elements.

B. 4. Clear the app cache: Go to Settings > Apps > Twitch > Storage > Clear Cache.