Device disconnecting with error 22 after bonded.

[NIDHIN K]

I am working on nrf51822 and SDKV10, Softdevice S110. Firmware has implemented whitelist features and enabled bonding.When i bonded the device using nrfConnect App and the firmware got IRK key of the phone. After i deleted IRK peer details from the FIRMWARE side , but not deleted from phone side. So when try to reconnect the same cannot able to connect with phone.

Iam using motog 5splus (ble 4) , but when try the same thing  using mi note 8 pro (ble 5) i can able to connect.

im getting the disconnect error 22 from motog 5splus (ble 4).

[Kenneth]

I think we need an on-air sniffer log here to understand what is occurring on the link:
https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Sniffer-for-Bluetooth-LE/Download#infotabs

Documentation:
https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html