Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST

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Issue Description

Initial UE message: NAS Message Type Unknown
Received Initial UE message -- Service Request
Service request -- S-TMSI 0x15e33d1a
Service request -- eNB UE S1AP Id 6
Service Request -- Short MAC valid
Service Request -- User is ECM DISCONNECTED
UE previously assigned IP: 172.16.0.4
Generating KeNB with UL NAS COUNT: 4
UE Ctr TEID 0
Sent Initial Context Setup Request. E-RAB id 5 
Received Initial Context Setup Response
E-RAB Context Setup. E-RAB id 5
E-RAB Context -- eNB TEID 0x60c05; eNB GTP-U Address 192.168.23.139
Initial Context Setup Response triggered from Service Request.
Sending Modify Bearer Request.
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_MODIFY_BEARER_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
UL NAS: Detach Request
Detach request -- IMSI 901011234567890
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_DELETE_SESSION_REQUEST
Received UE Context Release Complete. MME-UE S1AP Id 10
UE Context Release Completed.

Setup Details

EPC: Deepin 20.2.1 (upstream Debian 10.9), commit 89f16ee

UE: Xiaomi 8 (Android 10, SDK 29)

eNB: purchased HeNB

USIM: purchased magic USIM

Expected Behavior

UE attached and network access

Actual Behaviour

UE attached without network access

UE is unable to ping 172.16.0.1, EPC is unable to ping 172.16.0.4 either.

Steps to reproduce the problem

Additional Information

I found some similar issues but there's no reply:

https://lists.softwareradiosystems.com/pipermail/srslte-users/2019-April/002530.html
https://lists.softwareradiosystems.com/pipermail/srslte-users/2020-November/003926.html
https://lists.softwareradiosystems.com/pipermail/srslte-users/2021-February/004112.html

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[Melon08P4]

Did u resolve this problem ?