Do dried beans get mushy/ overcooked when cooked in a nonstick pot? If so, why?
They shouldn't! Two things that will make them mushy though? If you over-stir, or if you boil too vigorously. Otherwise, use your nonstick pot as you will.
I never heard of the teflon connection. But, if you have *Very* soft water--that can make the beans mushy. Just adjust the cooking time and use a low simmer.
We have the opposite problem with hard water and that can be counteracted with a pinch of baking soda and I mean just a pinch or they will mush.
If it's a problem that happens often for you, you might try again with distilled water for the cooking process.