Hmmmm. What version of Android is your radio running? Google play is installed and up to date? Still haven’t seen a crash report, it’s online too?
As for the Due issue, is the USB female the only port? Is there a micro USB? Can you plug the radio into the computer to flash firmware or anything? What model of radio did you buy again, I can look at the user manual to see if I can find anything to help.
For the Newsmy, I think the majority of the inconstancy is the version of Android (I know, a cop-out excuse). Maybe it’s a shotty cable though? If the Due isn’t discovered the radio won’t be either, it’s a prerequisite for the radio. Once the Due is connected though, the radio should work fine.
Did you fix the cable? Maybe there’s a loose solder connection on the shield? Any loose connections would cause inconsistent behavour.