Hi! I also ordered these aliexpress fobs and its my first time so it has been really frustrating.
usbinvert causes my tx to also show up as tansmit local source but when I change it to usb it is ok then. Try usb, it should stop that if we have the same fobs. I have modified the fobs with regular components as shown on How to Modify A CM108 Sound Fob For Allstar. - allstar setup.com .
Are you able to receive and transmit? Try using setting carrier to usb instead of invert, or copy my simpleusb settings from UV82 and CM108 wont release PTT - #18 by ap2x
I am facing an issue where my TX doesnt stop after it transmits expected response. Do you get the same problem by using my settings?
My setup is baofeng uv82, cm108 fob, ASL3 on debian