Phone bottom end got hot, plastic melted, fire concern

[mronell]

Hi,

I am using a Pinephone 64 Beta  edition as my main cell phone.  It has
been workable since mid-May 2021, and  I have been using the Mobian OS
to run  the phone.  It has  growing pains, but  until tonight,  I was
reasonably happy  with it.  Tonight, while  on a charging cord  that I
have been  using since  purchasing the  phone, the  bottom end  of the
phone got way too hot.  It has  always run very warm, but this was not
reasonable.  The  charging cord  end started to  melt.  Felt  like the
battery might enter thermal runaway.  I  believe that the phone is now
not safely  usable.  The phone  is still  running and has  cooled down
maybe, but I am  not sure whether there is lasting  damage and I don't
want my home and  family burned.  I have it now  outside on a concrete
patio surface.

Is  there a  warranty?  Am  I on  my own?  The cord  seemed OK  until
tonight.  Once it  melted, the cord now seems unsafe  as well.  I have
that unplugged also.  The cord was  by Manhattan, 10', USB-A to USB-C.
Charger  seems  OK.  We  have  other  similar  cords  in use  with  no
problems.

Marc