Gist: The issue is related to using RNCallKeep library in a React Native app on Android. When a call is initiated while the app is in the background or closed state, the RNCallKeep UI is invoked, but the desired behavior is to open the app's screen and handle the call through the app. The RNCallKeep.backToForeground() function is used to achieve this, but it causes the audio to stop working properly when using Agora to connect VOIP calls. This issue does not occur when handling calls manually and is only happening on Android, not on iOS devices.