Oh, this is very interesting. I am using a self powered USB 3 enclosure which works just fine with other routers.
Could you please do the following:
a) what is the version of AXT1800 firmware?

b) Can you press “Manual Setup” and show me a screenshot of the parameters defining protocol / port?

c) I assume you run the modem in QMI mode? Could you go to

http://YOU_MODEM_IP/#/modemmanage

run the following manual command: AT+QCFG="usbnet"

and show the screenshot with the command output?

d) can you please open luci and show the screenshot of the “Interface” page (want to see the name of WWAN interface, I have to create it manually).

e) can you please open the corresponding WWAN (LTE modem interface, whatever name it can have) and show me a screenshot with the general settings of the LTE interface (want to see protocol / device name)?


Last but not least - are you sure that you run your modem on the stock firmware and did not install any additional packages (I see that you work for GL.iNet and therefore your router could be used for tests, .i.e. some additional packages could be installed in the past)?

Thanks!