USB-C expansion card stops working and then starts to smoke

Framework Laptop 13
1

I have an AMD Framework 13 which is now one year old.

TLDR; One of my USB-C expansion card burned the plastic behind three pins of the male connector of both of my charging cables!

I never had any problems with my expansion cards up until yesterday and I even have a 3D printed one to hide my wireless mouse dongle (front left since this slot does not support display). For the other slots, I have had two USB-C in the back and a USB-A in the front right.

Yesterday, my laptop shutdown having only 2% battery left after I had plugged it in the USB-C on the back right slot despite (at least briefly) showing a charge. The other USB-C port (on the opposite side) worked so I got back to work.
This morning I plugged in an external display using a USB-C to HDMI cable which did not work. I tried with the other USB-C expansion card on all three display enabled slots worked.

So I tried what I thought was only logical, see if my home charger will work with the broken expansion card.
I put the laptop right side up and plugged it in. Nothing happened for the first few seconds, but then for about half a second the charging status LED turned on and it seemed to start charging only to stop for a good 5 seconds. This cycle repeated about 4 or 5 times but then I saw smoke coming out of the expansion card so I unplugged the charger instantly.
As it turns out it was the plastic in my charging cable in between the shield and the pins Vcc, RX2- (or is it RX1-?) and part of RX2+ (or RX1+) which had started to burn and is almost completely gone gehind these pins. I checked the other cable I use yesterday and it seems to have melted (not burnt) just enough to mould the same three pins backwards inside the plastic support.
What is strange is the faulty expansion card looks completely normal with just two pins in the “female” connector being covered by what I believe is a thin layer of burnt or melted plastic (likely from the cable I used today).

I was wondering if anyone had experienced a broken expansion card before?
Or maybe just port (not necessarily on a Framework) that could have melted or burn?

2

Just want to note that the USB-C expansion cards have no active components. They are merely short USB-C to USB-C extensions. I would suspect the female port on the card got damaged, or a piece of conductive debris got in there. The pins in USB-C port are very small and close together, damage can short a pin to a neighbor.