Good day, girls! Such a situation: The baby has completely stopped eat…

Good day, girls! Such a situation: The baby has completely stopped eating puree and porridge. Yesterday I tried replacing the puree with banana, the banana started eating, mashed it, he also started eating from a spoon. Then I put instead of banana - puree on a spoon. He figured out that something is not right there, and he didn't start eating, then I put banana again, barely swallowed even ? He gives him pediatric food, eats with pleasure. But puree and porridge are not in any way. As I introduced complementary foods, he ate well, but for about two weeks he doesn't eat at all. There is no strength, the eyes begin to twitch already, just switching products. What should