IMHO after 50 years of being involved with electronics, the lightning port is not a really good design in the service for which it is intended. - picking up fluff/grit and hiding it (yes I have had this) - very little tension on the eight very small contacts -quite large forces can be applied to the contacts in the charging port by the connector being pushed up & down or from side to side, damaging the innards of the port. -leads are replaced by after market leads which may not meet the mechanical requirements causing insufficient contact tension ( some after market leads that I have had, have little or no gold plating) All this will lead to non charging and or the “may not be supported” message. Solutions. Do NOT buy the cheapest replacement leads. They will fail early & give you nothing but trouble. Do NOT put pressure on the leads. Preferably do NOT use the phone when you are charging it. See if some enterprising manufacturer in China will come up with a after marked rubber bung that blocks the charging...