Touchscreen Replacement Acting Erratically

Hi,

I just replaced the touchscreen on an iPad Mini.

The repair was done with the utmost care, but once laying the digitizer back down flat on the chassis, the touchscreen starts to register jittery and random input.

Once the touchscreen is lifted off the chassis, the problem goes away. Seems to be only when the digitizer makes contact with the aluminum frame.

If any one has any information on why this is happening and any possible fixes I would be very great full.

Thanks!