I'm using XBee 3 in API mode where the product family is XB3-24, Function set is Digi xbee3 Zigbee 3.0 and the firmware version is 100B. So in this, I got around 4ksps and sometimes it is around 8ksps. When I got 8ksps until I did not restart the modules it remains 8ksps. after restarting it is again 4ksps, Why? And my target is to achieve more than 8ksps. here I'm using the XCTU utility.