NRF_SO_RAI_NO_DATA does not cause RRC release in SLM/nrf9160 without send

NRF_SO_RAI_NO_DATA  AT#XSOCKETOPT=1,50 does not cause RRC release as expected, instead hipower LTE continues another ~20s.
https://github.com/nrfconnect/sdk-nrfxlib/blob/main/nrf_modem/include/nrf_socket.h#L211
Have a look into no RAI release AT dialogue and modem trace.

In case there is UDP packet send just after AT#XSOCKETOPT=1,50, RRC release ocurs immediatelly.
Have a look into RAI release trace and AT dialogue with send.

no RAI release trace and AT dialogue:

no RAI release trace-2022-08-24T20-42-33.342Z.bin

[PPK2] DUT Powered, Measurement started
0.14 <RESET> Wed Aug 24 22:42:31 2022
1.02 [PPK2] 100k/s AVG 4.27 mA Max 32.8 mA
2.02 [PPK2] 100k/s AVG 2.15 mA Max 32.8 mA
3.03 [PPK2] 100k/s AVG 0.002mA Max 0.007mA
4.03 [PPK2] 100k/s AVG 0.002mA Max 0.009mA
5.02 [PPK2] 100k/s AVG 0.002mA Max 0.008mA
5.06 <WAKEUP>
6.04 [PPK2] 100k/s AVG 1.30 mA Max 29.5 mA
6.43 [RX] Ready
6.43 [TX] AT
6.44 [RX] OK
6.44 [TX] AT%XMODEMTRACE=1,2
6.45 [RX] OK
6.45 [TX] AT%MDMEV=1
6.46 [RX] OK
6.46 [TX] AT%HWVERSION
6.47 [RX] %HWVERSION: nRF9160 SICA BQA
6.47 [RX] OK
6.47 [TX] AT%SHORTSWVER
6.48 [RX] %SHORTSWVER: nrf9160_1.3.1
6.48 [RX] OK
6.48 [TX] AT#XSLMVER
6.49 [RX] #XSLMVER: "2.0.2"
6.49 [RX] OK
6.49 [TX] AT%XPOFWARN=1,30
6.52 [RX] OK
6.52 [TX] AT%XSYSTEMMODE=0,1,0,0
6.53 [RX] OK
6.53 [TX] AT%REL14FEAT=1,1,1,1,0
6.55 [RX] OK
6.55 [TX] AT+CNEC=24
6.56 [RX] OK
6.56 [TX] AT+CMEE=1
6.57 [RX] OK
6.58 [TX] AT+CEPPI=1
6.58 [RX] OK
6.58 [TX] AT%RAI=1
6.59 [RX] OK
6.59 [TX] AT%XDATAPRFL=0
6.61 [RX] OK
6.61 [TX] AT%XNETTIME=1
6.62 [RX] OK
6.62 [TX] AT%XSIM=1
6.63 [RX] OK
6.63 [TX] AT+CEREG=5
6.64 [RX] OK
6.64 [TX] AT+CGEREP=1
6.65 [RX] OK
6.65 [TX] AT+CSCON=1
6.66 [RX] OK
6.66 [TX] AT%XTIME=1
6.67 [RX] OK
6.67 [TX] AT%XMODEMSLEEP=1,0,10240
6.68 [RX] OK
6.68 [TX] AT+CPSMS=1,,,"00111000","00000000"
6.69 [RX] %XMODEMSLEEP: 4
6.70 [RX] OK
6.70 [TX] AT#XSLEEP=2
6.71 [RX] OK
7.02 [PPK2] 100k/s AVG 4.06 mA Max 31.1 mA
8.02 [PPK2] 100k/s AVG 0.025mA Max 4.70 mA
9.02 [PPK2] 100k/s AVG 0.022mA Max 0.028mA
10.02 [PPK2] 100k/s AVG 0.022mA Max 0.029mA
10.86 [PPK2] ====== SUM: INIT 0.003uA/h ======
11.63 <WAKEUP>
11.64 [RX] Ready
11.74 [TX] AT%XMODEMTRACE=1,2
11.76 [RX] OK
11.76 [TX] AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
11.79 [RX] OK
11.80 [TX] AT+COPS=1,2,"23003"
11.81 [RX] OK
11.81 [TX] AT+CGDCONT=1,"IP","hardwario.com"
11.83 [RX] OK
11.83 [TX] AT+CFUN=1
11.91 [RX] OK
11.91 [RX] %XMODEMSLEEP: 4,0
12.02 [PPK2] 100k/s AVG 4.52 mA Max 49.6 mA
12.81 [RX] %XSIM: 1
12.81 [TX] AT+CGSN
12.82 [RX] 352656106109476
12.82 [RX] OK
12.82 [TX] AT+CIMI
12.83 [RX] 901288000012723
12.83 [RX] OK
13.03 [PPK2] 100k/s AVG 33.4 mA Max 48.7 mA
14.01 [PPK2] 100k/s AVG 33.6 mA Max 162mA
15.03 [PPK2] 100k/s AVG 27.1 mA Max 761mA
16.02 [PPK2] 100k/s AVG 24.7 mA Max 340mA
17.04 [PPK2] 100k/s AVG 1.08 mA Max 2.12 mA
17.33 [RX] +CEREG: 2,"AE38","000AC51F",9
18.02 [PPK2] 100k/s AVG 10.7 mA Max 275mA
18.02 [RX] +CSCON: 1
19.01 [PPK2] 100k/s AVG 46.1 mA Max 342mA
20.02 [PPK2] 100k/s AVG 37.8 mA Max 243mA
20.40 [RX] +CGEV: ME PDN ACT 0,0
20.40 [RX] +CNEC_ESM: 50,0
20.41 [RX] %MDMEV: SEARCH STATUS 2
20.41 [RX] +CEREG: 5,"AE38","000AC51F",9,,,"00000000","00111000"
20.41 [TX] AT+COPS?
20.42 [RX] +COPS: 1,2,"23003",9
20.42 [RX] OK
20.42 [TX] AT%XCBAND
20.42 [RX] %XCBAND: 20
20.43 [RX] OK
20.43 [TX] AT+CEINFO?
20.44 [RX] +CEINFO: 0,1,C,8,1,-100,12
20.44 [RX] OK
20.44 [TX] AT+CGDCONT?
20.45 [RX] +CGDCONT: 0,"IP","hardwario.com","10.0.0.157",0,0
20.45 [RX] +CGDCONT: 1,"IP","hardwario.com","",0,0
20.45 [RX] OK
20.45 [TX] AT#XDATACTRL=40
20.46 [RX] OK
20.46 [TX] AT#XSOCKET=1,2,0
20.47 [RX] #XSOCKET: 0,2,17
20.47 [RX] OK
20.62 [RX] %XTIME: ,"22804202240580","01"
20.63 [TX] AT#XSOCKETOPT=1,50
20.63 [RX] OK
21.02 [PPK2] 100k/s AVG 39.0 mA Max 269mA
22.02 [PPK2] 100k/s AVG 36.9 mA Max 51.2 mA
23.02 [PPK2] 100k/s AVG 36.1 mA Max 50.9 mA
24.03 [PPK2] 100k/s AVG 36.6 mA Max 51.2 mA
25.03 [PPK2] 100k/s AVG 36.9 mA Max 51.4 mA
26.04 [PPK2] 100k/s AVG 36.9 mA Max 50.7 mA
27.01 [PPK2] 100k/s AVG 36.9 mA Max 51.5 mA
28.01 [PPK2] 100k/s AVG 36.3 mA Max 51.2 mA
29.01 [PPK2] 100k/s AVG 36.4 mA Max 50.8 mA
30.01 [PPK2] 100k/s AVG 36.9 mA Max 51.2 mA
31.01 [PPK2] 100k/s AVG 36.9 mA Max 51.5 mA
32.06 [PPK2] 100k/s AVG 36.9 mA Max 51.3 mA
33.01 [PPK2] 100k/s AVG 36.4 mA Max 51.0 mA
34.04 [PPK2] 100k/s AVG 36.3 mA Max 51.3 mA
35.03 [PPK2] 100k/s AVG 36.9 mA Max 51.4 mA
36.03 [PPK2] 100k/s AVG 36.9 mA Max 50.8 mA
37.04 [PPK2] 100k/s AVG 36.9 mA Max 51.3 mA
38.03 [PPK2] 100k/s AVG 36.6 mA Max 51.3 mA
39.02 [PPK2] 100k/s AVG 36.1 mA Max 50.7 mA
40.02 [PPK2] 100k/s AVG 36.9 mA Max 50.9 mA
41.01 [PPK2] 100k/s AVG 36.9 mA Max 50.9 mA
41.09 [RX] +CSCON: 0
41.09 [RX] %XMODEMSLEEP: 1,86399999
42.03 [PPK2] 100k/s AVG 3.83 mA Max 258mA
43.02 [PPK2] 100k/s AVG 1.01 mA Max 2.07 mA
44.02 [PPK2] 100k/s AVG 1.01 mA Max 2.10 mA

RAI release trace and AT dialogue with send:

RAI release with send trace-2022-08-24T21-19-22.853Z.bin

[PPK2] DUT Powered, Measurement started
0.17 <RESET> Wed Aug 24 23:19:22 2022
1.03 [PPK2] 100k/s AVG 4.22 mA Max 37.1 mA
2.01 [PPK2] 100k/s AVG 2.05 mA Max 32.0 mA
3.03 [PPK2] 100k/s AVG 0.002mA Max 0.007mA
4.02 [PPK2] 100k/s AVG 0.002mA Max 0.007mA
5.04 [PPK2] 100k/s AVG 0.002mA Max 0.007mA
5.11 <WAKEUP>
6.02 [PPK2] 100k/s AVG 1.34 mA Max 24.9 mA
6.48 [RX] Ready
6.48 [TX] AT
6.48 [RX] OK
6.48 [TX] AT%XMODEMTRACE=1,2
6.50 [RX] OK
6.50 [TX] AT%MDMEV=1
6.51 [RX] OK
6.51 [TX] AT%HWVERSION
6.53 [RX] %HWVERSION: nRF9160 SICA BQA
6.53 [RX] OK
6.53 [TX] AT%SHORTSWVER
6.54 [RX] %SHORTSWVER: nrf9160_1.3.1
6.55 [RX] OK
6.55 [TX] AT#XSLMVER
6.55 [RX] #XSLMVER: "2.0.2"
6.55 [RX] OK
6.55 [TX] AT%XPOFWARN=1,30
6.57 [RX] OK
6.57 [TX] AT%XSYSTEMMODE=0,1,0,0
6.58 [RX] OK
6.58 [TX] AT%REL14FEAT=1,1,1,1,0
6.60 [RX] OK
6.60 [TX] AT+CNEC=24
6.61 [RX] OK
6.61 [TX] AT+CMEE=1
6.62 [RX] OK
6.62 [TX] AT+CEPPI=1
6.63 [RX] OK
6.63 [TX] AT%RAI=1
6.64 [RX] OK
6.64 [TX] AT%XDATAPRFL=0
6.65 [RX] OK
6.65 [TX] AT%XNETTIME=1
6.66 [RX] OK
6.67 [TX] AT%XSIM=1
6.67 [RX] OK
6.67 [TX] AT+CEREG=5
6.69 [RX] OK
6.69 [TX] AT+CGEREP=1
6.70 [RX] OK
6.70 [TX] AT+CSCON=1
6.70 [RX] OK
6.71 [TX] AT%XTIME=1
6.72 [RX] OK
6.72 [TX] AT%XMODEMSLEEP=1,0,10240
6.74 [RX] OK
6.74 [TX] AT+CPSMS=1,,,"00111000","00000000"
6.74 [RX] %XMODEMSLEEP: 4
6.75 [RX] OK
6.75 [TX] AT#XSLEEP=2
6.76 [RX] OK
7.01 [PPK2] 100k/s AVG 4.14 mA Max 31.0 mA
8.04 [PPK2] 100k/s AVG 0.021mA Max 0.029mA
9.04 [PPK2] 100k/s AVG 0.022mA Max 0.029mA
10.04 [PPK2] 100k/s AVG 0.022mA Max 0.030mA
10.91 [PPK2] ====== SUM: INIT 0.003uA/h ======
11.68 <WAKEUP>
11.69 [RX] Ready
11.80 [TX] AT%XMODEMTRACE=1,2
11.82 [RX] OK
11.82 [TX] AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
11.84 [RX] OK
11.85 [TX] AT+COPS=1,2,"23003"
11.86 [RX] OK
11.86 [TX] AT+CGDCONT=1,"IP","hardwario.com"
11.87 [RX] OK
11.88 [TX] AT+CFUN=1
11.96 [RX] OK
11.96 [RX] %XMODEMSLEEP: 4,0
12.02 [PPK2] 100k/s AVG 3.61 mA Max 49.7 mA
12.86 [RX] %XSIM: 1
12.86 [TX] AT+CGSN
12.87 [RX] 352656106109476
12.87 [RX] OK
12.87 [TX] AT+CIMI
12.88 [RX] 901288000012723
12.88 [RX] OK
13.03 [PPK2] 100k/s AVG 33.4 mA Max 41.0 mA
14.00 [PPK2] 100k/s AVG 30.5 mA Max 409mA
15.01 [PPK2] 100k/s AVG 36.5 mA Max 1006mA
16.01 [PPK2] 100k/s AVG 1.50 mA Max 44.0 mA
17.03 [PPK2] 100k/s AVG 1.08 mA Max 2.10 mA
18.02 [PPK2] 100k/s AVG 1.08 mA Max 1.80 mA
18.59 [RX] +CEREG: 2,"AE38","000AC51F",9
19.02 [PPK2] 100k/s AVG 5.33 mA Max 59.1 mA
19.28 [RX] +CSCON: 1
20.03 [PPK2] 100k/s AVG 38.9 mA Max 333mA
20.40 [RX] +CGEV: ME PDN ACT 0,0
20.40 [RX] +CNEC_ESM: 50,0
20.40 [RX] %MDMEV: SEARCH STATUS 2
20.41 [RX] +CEREG: 5,"AE38","000AC51F",9,,,"00000000","00111000"
20.41 [TX] AT+COPS?
20.41 [RX] +COPS: 1,2,"23003",9
20.41 [RX] OK
20.41 [TX] AT%XCBAND
20.42 [RX] %XCBAND: 20
20.42 [RX] OK
20.42 [TX] AT+CEINFO?
20.43 [RX] +CEINFO: 0,1,C,8,1,-96,14
20.43 [RX] OK
20.43 [TX] AT+CGDCONT?
20.44 [RX] +CGDCONT: 0,"IP","hardwario.com","10.0.0.157",0,0
20.45 [RX] +CGDCONT: 1,"IP","hardwario.com","",0,0
20.45 [RX] OK
20.45 [TX] AT#XDATACTRL=40
20.46 [RX] OK
20.46 [TX] AT#XSOCKET=1,2,0
20.46 [RX] #XSOCKET: 0,2,17
20.46 [RX] OK
20.81 [RX] %XTIME: ,"22804212911480","01"
20.82 [TX] AT#XSOCKETOPT=1,50
20.82 [RX] OK
20.82 [TX] AT#XSENDTO="192.168.168.1",20000
20.85 [TX] DATA(1B): HEX 30 ...
20.91 [TX] +++ (Exit datamode by sending +++)
20.96 [RX] OK
21.03 [PPK2] 100k/s AVG 38.2 mA Max 271mA
21.48 [RX] +CSCON: 0
21.48 [RX] %XMODEMSLEEP: 1,86399999
22.03 [PPK2] 100k/s AVG 18.9 mA Max 276mA
23.02 [PPK2] 100k/s AVG 1.01 mA Max 2.11 mA
24.02 [PPK2] 100k/s AVG 1.02 mA Max 2.07 mA
25.05 [PPK2] 100k/s AVG 1.01 mA Max 2.03 mA

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