A new "Energy Saver" mode in IOS optimizes performance when your device's resources are low. When you've joined a broadcast as a guest and the app detects that your device is under stress, Energy Saver mode will automatically engage. With Energy Saver enabled:
Your audio and video will continue streaming to the other participants normally
The other participants will switch to audio-only on your device to conserve bandwidth and power
The broadcast monitor will close to conserve bandwidth and power
This helps ensure the best quality streams for everyone, even on older devices. Should your device performance improve, you can manually disable Energy Saver mode in the options menu.