Wow...I never heard of that before. My mother used to say they bind you up, but that's not true. Bananas actually help to neutralize the acid in your stomach, and help with digestion, and can work on certain bacteria in the stomach.
I have a hiatal hernia too, and am not supposed to drink soda, coffee, citric juices, or eat chocolate. I do drink diet-caffeine-free Pepsi, have two cups a coffee each day, and do eat chocolate, although I'm diabetic, so I do it sparingly. Juices like orange or pineapple have way too much sugar in them. I've found that Ocean Spray makes a diet 1G sugar cranberry juice that comes in various flavors like Cran-Grape, Cran-Cherry, etc., that I have in the morning to take my pills with. It's perfect, as it doesn't add a lot of sugar to the diet.
If my doctor told me not to have coffee or chocolate, I’d just ask him for a prescription for strychnine on the spot. I definitely see why you don’t listen...you make a couple of adjustments, but you cannot give up those two basic food groups.