Although the instant pot is an incredible kitchen tool, you can overcook anything. Even if you cook a soup with just liquid, like broth, you can overcook it and cause it to scorch or burn at the bottom. And you know what happens if you get that dreaded BURN notice on your instant pot. You have to turn it off, unplug it, and start over. Also, scorching soup leaves a foul smell and a worse taste, especially tomato with garlic. Only cook the soup as long as the directions tell you.