SDK15.2 ANCS phone unable to bind after forgot device

[thong]

Example:nRF5_SDK_15.2.0_9412b96\examples\ble_peripheral\ble_app_ancs_c\pca10040e\s112\arm4

I tested ancs on the board,connected ancs with the iphone, chose to forget the device in Bluetooth, clicked on the device again, and showed pairing unsuccessful. I don't know how to delete pairing in the examples. I think after iphone forget the device,click on the device again to  pairing;

[thong]

I use 52810 development board, 15.2 SDK, S112 project, has been changed according to the requirements. After forgetting the device on the iphone, I paired it in Bluetooth. After successfully exiting the Bluetooth interface, ANCs automatically disconnected.

[thong]

The bottom of the list is to exit the bluetooth page of the phone after the new pairing