05-01-2021, 08:23 AM
The glass is glued on the screen using a UV-cured bond. These are typically rated for 350°F / 176°C. I highly doubt such temperatures have been reached, to be quite frank. Temperature as definite cause is simply unconfirmed and the fact that both of you don't have a big squared stain on top of the SoC but instead stains on the colder corners points towards other directions.