Woke up on Monday and my Pixel 6 Pro wasnt quite fitting in the case while i was checking news while having coffee on the morning. Pushed it in and it didnt seem to fit right. Took the case off to find it had turned itself into a spicy pillow and was splitting along the side. Was 1 month inside warranty, messaged support who told me it was wear and tear initially. I made it quite clear i wasnt accepting that and there wasnt even any way that internal adhesive failing would be wear and tear, never mind battery expansion. They agreed to replace it with a refurb as a goodwill gesture, how very nice of them. I upgraded the same day to a S23 Ultra and have sold the refurb to a reseller.
Pixel 6 Pro was not a fantastic phone, though battery issues like that are usually caused by overheating. Prolonged use of a phone in hot conditions will cause frequent overheating and rapid degrading of the batteries. Examples of this are putting them in car dashboards in the hot sun, or charging them in the sun.
I use it as my navigation on my motorcycle. It's shut itself off multiple times on me when I'm in stop-and-go traffic and the air stops cooling it enough. I've also had it go into overheat mode trying to film my wife playing in a sports competition. At least the bluetooth more or less works finally.