Why do I get a 'food burn' alert every time I use my pressure cooker?

I have an Instant Pot that I love to use to prepare food, and for the first dozen meals it operated without issue. Lately, however, I get a ‘food burn’ alert every single time I use it. As expected, my food has stuck to the bottom of the detachable pot and needs to be scraped off. What is surprising me is that it isn’t happening when I cook a specific meal, it’s on every meal I prepare using the pressure cooker.

The same recipes that used to be prepared without issue now need to be scraped clean from the pot. I’m not altering the recipes, except to perhaps add more liquid to prevent food from sticking.

Is there a common reason for this to happen? Is there a certain way I should load that Instant Pot that I may have stopped doing since I purchased it? Should I clean a certain part of the pressure cooker to increase the efficacy of the cookware?