I'll just add that my power was off for 6+ hours, then on for one hour, then out again for another 22+ hours.

On Friday night, I filled a large ziplock bag with ice cubes and stuck it in the freezer. I also moved most items from the fridge to the freezer. I used the ziplock bag to judge how badly the freezer thawed.

At the end of my time without power, all the cubes were still in their pre-blackout shape and only a tiny bit of water had collected and refroze at the bottom of the ziplock. I decided to eat chicken from the freezer last night due to this, and I'm still alive/healthy.

My fridge is quite low-end and is probably at least 10 years old. Maybe you need a new magnetic door gasket?