Do you still have the original screen in a somewhat working condition? If so, try the original screen and see if this problem persists. That way we can rule out the screen.
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=== Update (10/07/2018) ===
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@blewisgabriel Sounds like we have our problem solved! If you wish you can buy another replacement screen at the link below. Go ahead and mark this as correct for completion sake.
Do you still have the original screen in a somewhat working condition? If so, try the original screen and see if this problem persists.
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Do you still have the original screen in a somewhat working condition? If so, try the original screen and see if this problem persists. That way we can rule out the screen.