Dear Apple Support Team,
Thank you for your continued support.
I would like to inquire about the behavior of CallKit. Our company provides an office PBX extension phone application (iPhone app).
When the iPhone is placed into sleep mode (screen off) and our app receives an incoming call, the following sequence sometimes results in an audio playback panel
appearing at the bottom of the lock screen for a few seconds after the call ends(See attachment file for detail).
Sequence to reproduce the issue:
- Put the iPhone into sleep mode (screen off).
- Receive an incoming call to our extension phone app.
- CallKit incoming call screen appears.
- Answer the call.
- Conduct the call.
- End the call from the peer.
iOS versions with confirmed behavior:
- iOS 26.0: Not observed.
- iOS 26.2: Observed.
- iOS 26.3: Not observed.
This behavior does not affect the call functionality itself; however, some users report that the temporary appearance of the audio playback panel feels unusual.
If there is any known reason for this behavior or any recommended workaround, we would greatly appreciate your guidance. Additionally, if this is a known issue that was addressed in iOS 26.3, we would appreciate any information you can provide regarding that as well. Thank you very much for your assistance.
