MCU Firmware Missing

Hi,
Sometimes Mcu Firmware Missing suddendly .

Device Details:
Device: WP7608
Firmware Version: SWI9X07Y_02.16.02.00 000000 jenkins 2018/04/19
19:59:02
Bootloader Version: SWI9X07Y_02.16.02.00 000000 jenkins 2018/04/19
19:59:02
MCU Version: 002.009
Legato Version: 18.06.3_69d8a71199a354ce67a45989abdf0967_modified

Observation:
-Application didn’t crash its working normally
-Manually poweroff and turn on the device MCU firmware is missing
-It will recover once it hard restart the device.

Kindly let me know the reason ASAP
Thanks in advance

how about using latest FW R13.x?

Currently we are using R16 FW Still we re facing same issue.

I don’t see problem:
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7607-1
Revision: SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
IMEI: 359780080500170
IMEI SV: 6
FSN: V2842570321010
+GCAP: +CGSM

OK
ati8
Legato Ver: 19.02.0_87cc5f813301994d76389339c0e37301
Yocto Ver: SWI9X07Y_02.28.03.05 2020-10-14_06:19:24
OS Ver: Linux version 3.18.131 (oe-user@oe-host) (gcc version 7.3.0 (GCC) ) #1 PREEMPT Wed May 6 07:24:46 UTC 2020
LK Ver: SWI9X07Y_02.28.03.05
RootFS Ver: SWI9X07Y_02.28.03.05 2020-10-14_06:19:24
UserFS Ver: unknown
MCU Ver: 002.011

OK

Is this only happening to one particular module?

It happens randomly …

how many module have you tested?

Issue has been observed in around 8 modules

For your reference

In R16 Firmware

you might contact distributor as this seems to be hardware issue.

This issue is likely due to I2C communication failure between the swimcu kernel driver and the MCU.

The workaround is to reboot the module however, be aware a reboot only reboots the MDM, not the MCU.

BR,
Chris

What if the issue occurs in the field ? Whether Sierra wireless is working on this issue?
Can we have the resolution in nearby future?