Did you flash a Latin America ROM at one time? You getvar output shows you have LA firmware on a Indian device... Are you flashing the correct firmware image?
I feel sorry, but I have to admit that I flashed XT1681-XT1683_POTTER_BRASIL_LATAM_MEXICO_7.0_NPN25.137-15_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml. But, it did work. i.e., the device booted up. Only when it was on the way to install August OTA update, it never booted up again. That was the last time I saw my device with life.
Now, I'm trying to install POTTER_NPN25.137-67-5_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml as given here at https://forum.xda-developers.com/g5-plus/how-to/stock-firmware-npn25-137-67-5-fastboot-t3694738.
Am I doing correct? Kindly let me know.