I also charge on the upper left side, have a mainboard from batch 5, and have a melted plastic cover. I noticed it because I was looking to reset the mainboard after my laptop died, but wasn’t seeing any lights on the left hand side.
Now that I see the damage, I’m guessing it might be the cause of the laptop/left USBs not working.
Is it still worth sending this in for analysis?
Edit: edited “because the USBs aren’t working” to correctly order cause and effect. Also, I contacted support ^-^