charger in series with light bulbs
When the switch is off, power is applied in series to non-dimmable buck regulated LED and buck regulated phone charger.  The impedance of the Bulb must be lower so it sees an undervoltage conduction but may still be passing current and getting conduction losses.  

You may check to see if the bulb gets warm even after a while indicating efficiency loss and beware that you have no power off condition or switch to enable both. Fix it properly.