we got errror, SOFTDEVICE: ASSERTION FAILED in SDK_15.3.0 on our custom hardware based on nRF52832.

Our custom board uses internal RC clock source and I tried to build original sample app, "ble_app_pwr_profiling" in SDK 15.3.0 using attached sdk_config.h modified only with LF Clock setted to RC source. then after we go "for loop" in the main() and enter the idle_state_handle(), we got the error, "SOFTDEVICE: ASSERTION FAILED" in the app_error_fault_handler(). I attached the debug capture file below with our sdk_config.h and our schematic. please how can I why this problem occurred?

our sdk_config.h:


our schematic is as followings: