Hello everyone! Girls, tell me, who had this experience?

Hello everyone! Girls, tell me, who had this experience? Baby on breast milk. After each feeding, it throws up, and then it spits up. Not much, but not little either. Just when I put him in bed. Although before that I walk like a column, sometimes for an hour with him in a vertical position, he makes burps, but only as soon as I put him in bed, everything, after a couple of minutes he wakes up and throws up. The pediatrician didn't say anything about it. Who has encountered something similar? What can be done?