Upload & Sell: On
OK; I understand what you are saying now. FWIW, I'd suggest getting more cards if you want to work that way. BTW, it is not accurate to say that no other cameras have this problem when exposed to the workflow you outline; I have definitely heard of this in the medium format world before.
One way to work the way you want and not have the problem is to "quarantine" the various connecting devices' behaviour this way: once you shoot a card and take it out of the camera, keep it out, and connect it to any devices you want; it will not matter what devices you connect it to before getting home and doing the final copy. Use the other cards for the rest of the trip the same way.
All I am saying is that if I were having the problem that you described, and you want to maintain the workflow you describe, finding a way of solving the problem seems better than returning the camera, assuming you liked it. Quarantining the card in the way I describe will solve the problem, but will require that you format the card before using, which is all I was saying before. Over and out on this.
I know this is OT to everyone else here, but I would be interested in other opinions. Personally, I would never connect or use a working card in another device and not format it before re-using, but that's just me.