Screen jumping with new digitizer/glass

I have replaced a client's iPad air glass/digitizer with a new one and it tested fine before closing up. Once the internal protective sheet and adhesive were removed and the glass pressed down, the screen takes on a life of its own.

I have since tried another glass panel and had the same issues.

This time I was able to narrow down the cause to the upper folded ribbon for the touch interface (you will recall there are three ribbons and two plugs, the top one is the culprit).

I have NOT folder these ribbons flat, they are stuck to the screen in the same location/depth as the original ones were...

(I am am an experienced fitter, well into 3 figures on ipads and phones etc. but this is only the 3rd Air we have had...)

Please help!

Cheers,

Marc