If ueCOntextReleaseRequest send after ongoing initialcontextSetupprocess, 5gc hang

hi
CPE was already in registered state,and after seconds,it start a new iue.register.req.
5gc send initialcontextrequest.and wait for the response,however, it got the ueContextReleaseRequest.
at this time,it hang.uecontextRelease.pcap (4.8 KB)
WARN[2020-09-10T15:36:49+08:00]/src/amf/ngap/handler.go:4070 free5gc/src/amf/ngap.printAndGetCause() Cause RadioNetwork[1] AMF=NGAP
INFO[2020-09-10T15:36:49+08:00]/src/amf/ngap/handler.go:1971 free5gc/src/amf/ngap.HandleUEContextReleaseRequest() [NGAP] Ue Context in Non GMM-Registered AMF=NGAP
contentType:application/json
INFO[2020-09-10T15:36:49+08:00]/src/smf/pdusession/api_individual_sm_context.go:27 free5gc/src/smf/pdusession.ReleaseSmContext() Recieve Release SM Context Request SMF=pdu_session
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