If you're looking for things to avoid because it can cause gastric problems, you're looking for foods that should not be combined.
And yes carbs and animal protein are top of the list (and also one of the most common digestive mistakes people make)
When you eat a combination of carbohydrate or starch and lean protein (such as meat with potatoes or bread) they counteract each other: the animal protein putrefiesi and the carbohydrate (complex carb or simple carb) ferments. This bad combination leads to gas, bloating and flatulencei (1). Those who have eaten this combination in their diet for years may have developed immunity, but it is better to eat complementary combinations like beans and rice which is a good combination.