A mandatory software update addresses this problem, but you still need to take action. Here's how to apply for a battery replacement or other support options

According to the Reddit post, the phone was plugged into a standard USB-PD charger overnight (the OEM Steam Deck plug). The unlucky owner awoke to a burning smell and a face full of battery fumes but was able to fling the flaming phone onto the floor, where it thankfully expended its remaining energy without setting the house ablaze.