iPhone 6 Screen Replacement Light Leakage

So i've now gone through 2 replacements of the complete assembly (minus touch id) from different suppliers and I am onto a 3rd, however consistently, there is a small gap of light leaking from the mute slider and there is a visible raise when compared to an original.

Almost certain the phone isn't bent as an original screen doesn't have this issue.

Is there any way to fix this with a small amount of adhesive or anything else? I have reseated it a couple of times to the same result.