RC76xx modem stuck in low power mode

Hi,

During regression tests, my unit with RC7620 got stuck in low power mode. It remained so even after reboot. After explicitly forcing it to go to online mode with at+cfun=1, it recovered. Never saw this issue before.
ati
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620
Revision: SWI9X07H_00.09.10.00 85890e jenkins 2023/09/25 03:16:56
IMEI: 353634110774105
IMEI SV: 29
FSN: CM3376752412B1
+GCAP: +CGSM

OK

at!impref?
!IMPREF:
preferred fw version: 00.00.00.00
preferred carrier name: AUTO-SIM
preferred config name: AUTO-SIM_000.000_000
preferred subpri index: 000
current fw version: 00.09.10.00
current carrier name: GENERIC
current config name: GENERIC_001.164_000
current subpri index: 000

OK

Any input on probable root causes for this scenario is highly appreciated.

Thanks,
Sai.

did you check AT!PCINFO? to see why it stuck in low power mode?