Calling scan_start() will not trigger a scan

[Karr]

I have a question. The sample code I modified is nRF52832\examples\ble_central\ble_app_uart_c.
Scanning will be triggered when scan_start() is called. The device has been found in BLE_GAP_EVT_ADV_REPORT in nrf_ble_scan_on_ble_evt.

Now, I prepare a NUS peripheral connected to the center. However, when I call scan_start() in this connection state, I will not receive nrf_ble_scan_on_ble_evt unless I disconnect from the NUS peripheral.

Does anyone know where the problem is or what am I missing?

[Karr]

// <o> NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links.
#ifndef NRF_SDH_BLE_PERIPHERAL_LINK_COUNT
#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 1
#endif

// <o> NRF_SDH_BLE_CENTRAL_LINK_COUNT - Maximum number of central links.
#ifndef NRF_SDH_BLE_CENTRAL_LINK_COUNT
#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 2
#endif

// <o> NRF_SDH_BLE_TOTAL_LINK_COUNT - Total link count.
// <i> Maximum number of total concurrent connections using the default configuration.

#ifndef NRF_SDH_BLE_TOTAL_LINK_COUNT
#define NRF_SDH_BLE_TOTAL_LINK_COUNT 3
#endif