GADGETS3D Shield - question about electronics

Hi,

I just got my Gadgets3D LCD and I'm struggling to get it working.

I get it to display text and scrolling through the menu works as well. Only as soon as I press the rotary encoder the display get's messed up / doesn't work anymore.
(btw. tried with Repetier Firmware and with Marlin)

So I grabbed my voltmeter and noticed that there is a electric connection between one of the legs of the rotary encoder and one of the pins on the display (I think it's the RS pin)

I marked both in the attached image. Could anyone with the same panel verify that this is normal?

Thanks,
Alessio

just a quick update:
I got in contact with the seller of the shield and it seams that the connection is normal.
Still haven't got it working though, problem must be something else

Regards,
Alessio