This is a common issue with the quality of aftermarket digitizer glass. The OEM / original ones do not have this issue as far as I know.
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It could probably be mitigated by adding kapton / brown transparent electrical tape at the bottom border of the digitizer which is also where the home button cable is.
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Edit: Probably just an issue caused by a combination cheap wall chargers and cables.
Has the screen been replaced before?
This is a common issue with the quality of aftermarket digitizer glass. The OEM / original ones do not have this issue as far as I know.
It could probably be mitigated by adding kapton / brown transparent electrical tape at the bottom border of the digitizer which is also where the home button cable is.