I think one of the problem is, in android version, the QR gives "non hex" format of raw transaction ( something like this AFEA*0JN*-P9O1OY+:GV+.GKECS2R$KZW9$6MU6KPMMJLRI74SCEVS$K$NEASLB0.R.U3KEGJ+1UHYGF-Y-:PEY:ES-0D-$P0TUX1F4D6S5P..... ), while in desktop version the qr data is in hex format.
I'm on 2.6.1 both desktop and android.
this "non hex" format is called base43
it should be what both the desktop version and the android version use.