Did a BIOS & firmware update on my notebook yesterday, to fix a bunch of security issues in the Intel ME.
Closed the lid afterwards, put it back in its bag and connected the power plug because I needed it fully charged for today.
This morning I realized it failed to suspend after the BIOS update and managed to heat up to over 90 degrees in the bag
A ton of thermal errors in the journal, 1039 smart errors on the SSD, 20% battery capacity lost, a smell of molten plastic in the air.