Dumplings, as a product that already contains meat and dough, can be too heavy when combined with other starchy foods such as potatoes or pasta.
Combining dumplings with highly spicy or sour foods can overpower their flavor.
For example, adding vinegar can make a dish too aggressive for the taste buds.

Dumplings and fermented milk products may not go well together in terms of taste.
While sour cream is a popular addition to dumplings, other fermented milk products can create an unusual and not always pleasant flavor combination.
It is better to leave yogurt and kefir for other dishes.
Using fatty sauces can make the dish too high in calories and difficult to digest.
Adding creamy or oily sauces to them can increase the load on the gastrointestinal tract.