My app is not a VOIP application. I use devices that support character centering, such as iPad 10 or iPad 13.18. The system is iOS 18.0, 18.1, or 18.1.1. When entering live classes, the "Character Centering" button does not appear in the control center, as shown in the following picture. However, if Voice over IP is selected for Background Modes in the project and the app is run again, it will not be reproduced, even if it is uninstalled or reinstalled. Could you please help me investigate the reason? thank you!