No data path for nrUE - gNB in rfsimulator mode

The Develop branch seems to be broken when running OAI nrUE and gNB in rfsimulator mode. The SA connection is ok but the data path is not working. On nrUE I get [SDAP] error messages as shown below in bold each time data is to be transmitted.

[OIP]   Interface oaitun_ue1 successfully configured, ip address 192.198.0.4, mask 255.255.255.0 broadcast address 192.198.0.255
**[SDAP]   ../../../openair2/SDAP/nr_sdap/nr_sdap.c:44:sdap_data_req: Entity not found with ue rnti: 69b4 and pdusession id: 0**
[NR_PHY]   ============================================
[NR_PHY]   Harq round stats for Downlink: 28/3/0/0
[NR_PHY]   ============================================
[NR_PHY]   ============================================
[NR_PHY]   Harq round stats for Downlink: 35/3/0/0
[NR_PHY]   ============================================
[NR_PHY]   ============================================
[NR_PHY]   Harq round stats for Downlink: 41/3/0/0
[NR_PHY]   ============================================
[NR_PHY]   ============================================
[NR_PHY]   Harq round stats for Downlink: 48/3/0/0
[NR_PHY]   ============================================
**[SDAP]   ../../../openair2/SDAP/nr_sdap/nr_sdap.c:44:sdap_data_req: Entity not found with ue rnti: 69b4 and pdusession id: 0**

I wonder if this might be caused by some configuration parameter(s) change(s) in nrUE and/or gNB. I did not change any parameter in nrUE nor gNB. Just used the ones I used for regular tests of develop branch.

I also wonder if this configuration (nrUE-gNB in simulator mode) is properly tested in the CI and why such an error is not detected by CI.