Quectel AG35 DM port is not detecting after flashing

we are using Quectel AG35, After flashing the board sometimes the DM port is not detecting and again if we build the same software and flash it into the same board DM Port is detecting. we are following the same process and procedure for both building and flashing. We noticed that there are some changes in the AG35 log generated after the flash.

any inputs/help with this Log difference will be highly appreciated.

If you connect the AG35 on the Linux machine, please check the
lsusb -t