Using a heavy-duty extension cord to reach my charger from the only outdoor outlet I have, been doing it for a few months without any issue. This morning went out to grab something from the car and the plug end of the extension cord was warped, slightly melted into the outlet cover, faint burning smell. Car had charged completely fine overnight, showed no errors, charger app said everything was normal the whole session. Genuinely scares me that something could be that wrong with zero indication until I physically looked at it. Anyone else have this happen with a 'heavy duty' rated cord, or did I just get unlucky with a bad one?