CC2652R: ble scanning crashes after receiving some advertisements

void KB_App_enableScan(){
int status;
uint8_t temp8;
uint16_t temp16;

// Register callback to process Scanner events
status = GapScan_registerCb(KB_gap_ScanCallback, NULL);

// Set Scanner Event Mask
status = GapScan_setEventMask(GAP_EVT_SCAN_ENABLED | GAP_EVT_SCAN_DISABLED |
GAP_EVT_ADV_REPORT);

// Set Scan PHY parameters
status = GapScan_setPhyParams(DEFAULT_SCAN_PHY, DEFAULT_SCAN_TYPE,
DEFAULT_SCAN_INTERVAL, DEFAULT_SCAN_WINDOW);

// Set Advertising report fields to keep
temp16 = ADV_RPT_FIELDS;
status = GapScan_setParam(SCAN_PARAM_RPT_FIELDS, &temp16);
// Set Scanning Primary PHY
temp8 = DEFAULT_SCAN_PHY;
status = GapScan_setParam(SCAN_PARAM_PRIM_PHYS, &temp8);
// Set LL Duplicate Filter
temp8 = SCANNER_DUPLICATE_FILTER;
status = GapScan_setParam(SCAN_PARAM_FLT_DUP, &temp8);

// Set PDU type filter -
// Only 'Connectable' and 'Complete' packets are desired.
// It doesn't matter if received packets are
// whether Scannable or Non-Scannable, whether Directed or Undirected,
// whether Scan_Rsp's or Advertisements, and whether Legacy or Extended.
temp16 = SCAN_FLT_PDU_NONCONNECTABLE_ONLY | SCAN_FLT_PDU_EXTENDED_ONLY | SCAN_FLT_PDU_COMPLETE_ONLY;
status = GapScan_setParam(SCAN_PARAM_FLT_PDU_TYPE, &temp16);
status = GapScan_enable(_KB_GAP_PERIOD, DEFAULT_SCAN_DURATION, 0);
}
this is my gap scan enable mode and i'm using observer+peripheral mode 
while scanning for advertisements after receiving 70 advertisement my code crashes
kb_app.c
the above is the complete code where the scan is present

the above image is the observer configuration can i know the exact reason why after some 70 scanning data receiving crash the code
i'm also freeing the scanning data on receiving

edit:
the multi role example i tried with making pheripheral and obeserver , but it receive only 205 advertisement and didn't crash the code still the gapscan enable event is calling but it is not receiving any adv reports