Do not receive the SMF's stats when querying
Description: Only received a message like below:
Assume we connectd to a single CN with IP: 192.168.70.142
[AMF:[
"{\"notifyCorrelationId\":\"192.168.70.142:80/flexcn-status-notify/v1/amf001\",\"reportList\":[{\"state\":{\"active\":\"TRUE\"},\"supi\":\"imsi-208950000000031\",\"timeStamp\":\"3855808104\",\"type\":\"REGISTRATION_STATE_REPORT\"}]}",
"{\"notifyCorrelationId\":\"192.168.70.142:80/flexcn-status-notify/v1/amf001\",\"reportList\":[{\"state\":{\"active\":\"TRUE\"},\"supi\":\"imsi-208950000000031\",\"timeStamp\":\"3855808104\",\"type\":\"REGISTRATION_STATE_REPORT\"}]}"
],SMF:]
All the stats of SMF is missing.