I don’t see problem, please see the log below:
root@swi-mdm9x28-wp:~# wifi client start
successfully called start.
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm info
Device:                        WP7605
IMEI:                          353532100020465
IMEISV:                        6
FSN:                           2A917285070404
Firmware Version:              SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
Bootloader Version:            SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
MCU Version:
PRI Part Number (PN):          9908705
PRI Revision:                  002.006
Carrier PRI Name:              SIERRA
Carrier PRI Revision:          001.032_000
SKU:                           1104208
Last Reset Cause:              Power Down
Resets Count:                  Expected: 44     Unexpected: 0
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# wifi client scan
starting scan.
Found:  SSID:   “SWI-MOBILE”    BSSID:  “94:b4:0f:b9:04:61”     Strength:-67    Ref:0x10000003
Found:  SSID:   “”      BSSID:  “94:b4:0f:d2:47:63”     Strength:-71    Ref:0x1000000b
Found:  SSID:   “SWI-WLAN”      BSSID:  “94:b4:0f:b9:04:60”     Strength:-64    Ref:0x10000001
Found:  SSID:   “SWI-MOBILE”    BSSID:  “94:b4:0f:d2:47:61”     Strength:-71    Ref:0x10000009
Found:  SSID:   “SWI-GUEST”     BSSID:  “94:b4:0f:b8:fa:22”     Strength:-57    Ref:0x10000011
Found:  SSID:   “SWI-WLAN”      BSSID:  “94:b4:0f:d2:47:60”     Strength:-71    Ref:0x10000007
Found:  SSID:   “”      BSSID:  “94:b4:0f:b8:fa:23”     Strength:-56    Ref:0x10000013
Found:  SSID:   “SWI-MOBILE”    BSSID:  “94:b4:0f:b8:fa:21”     Strength:-57    Ref:0x1000000f
Found:  SSID:   “SWI-GUEST”     BSSID:  “94:b4:0f:b9:04:62”     Strength:-67    Ref:0x10000005
Found:  SSID:   “SWI-WLAN”      BSSID:  “94:b4:0f:b8:fa:20”     Strength:-57    Ref:0x1000000d
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# ^C
root@swi-mdm9x28-wp:~# wifi client setsecurityproto 0x10000003 3
Successfully set security protocol.
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# wifi client setpassphrase 0x10000003 password
Successfully set passphrase.
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# wifi client connect 0x10000003
Connecting…
CONNECTED.
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr D0:B5:C2:F1:F5:5B
inet6 addr: fe80::d2b5:c2ff:fef1:f55b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:3 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:364 (364.0 B)  TX bytes:888 (888.0 B)
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# app status
[running] atAirVantage
[running] atQmiLinker
[running] atService
[running] audioService
[running] avcService
[running] cellNetService
[running] dataConnectionService
[running] fwupdateService
[running] gpioService
[running] modemService
[running] portService
[running] positioningService
[running] powerMgr
[running] qmiAirVantage
[running] secStore
[stopped] smsInboxService
[stopped] spiService
[stopped] tools
[stopped] voiceCallService
[stopped] wifi
[stopped] wifiApTest
[stopped] wifiClientTest
[running] wifiService
[stopped] wifiWebAp
[stopped] hello6
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# app start hello6
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr D0:B5:C2:F1:F5:5B
inet addr:192.168.23.251  Bcast:192.168.23.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:51 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4106 (4.0 KiB)  TX bytes:2556 (2.4 KiB)
Nov 12 10:26:49 | hello6[3949]/hello6_exe T=main | _main.c main() 62 | == Starting Event Processing Loop ==
Nov 12 10:26:49 | hello6[3949]/hello6Component T=main | hello6Component.c _hello6Component_COMPONENT_INIT() 9 | Hello, world.
Nov 12 10:26:49 | hello6[3949] |  | udhcpc: started, v1.27.2
Nov 12 10:26:49 | hello6[3949] |  | udhcpc: sending discover
Nov 12 10:26:52 | hello6[3949] |  | udhcpc: sending discover
Nov 12 10:26:55 | hello6[3949] |  | udhcpc: sending discover
Nov 12 10:26:56 | hello6[3949] |  | udhcpc: sending select for 192.168.23.251
Nov 12 10:26:56 | hello6[3949] |  | udhcpc: lease of 192.168.23.251 obtained, lease time 86400
Nov 12 10:26:56 | hello6[3949] |  | /etc/udhcpc.d/50default: Adding DNS 8.8.8.8
Attached hello6.rar is the application I am using.
hello6.rar (287.2 KB)