iPad Air lifting by touchscreen cables after screen replacement.

I see this happen a lot, and it's usually due to using a poor quality adhesive or from not cleaning the frame of the device before applying new adhesive. There is a bit more pressure in that area just from the bulk of the cable, but make sure you are tucking it snuggly down into the slot next to the LCD and it should rest well. As for the adhesive, some digis come shipped with adhesive on them. I usually find this to be of low quality. I like to use red double-sided electronics tape and a bit of heat under some clamps to get everything to stay down. Once in awhile the digi will still lift right there, at which point some careful application of a tiny amount of super glue (use a little brush) helps keep it snug. The only issue with super glue is that you don't want to get it on any flexes or the LCD when applying it, as it can make removing the digi a nightmare if you have to open it back up for whatever reason.