SimCom SIM7100E not functional since MM version 1.20.5

[Florin]

Hi all,
we have been having issues with SimCom SIM7100E and MM since at least
version 1.20.5 (even older maybe, we have reports MM 1.18.4 works ok).
Have also tried using latest dev releases (MM 1.23.9, MBIM 1.31.5, QMI
1.35.5) but the modem still fails to function correctly.
I have created this issue
https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/884
in which I added the debug logs for MM.
Let me know if I can gather any other logs to help with this.
Thank you.