What is likely to causes air to enter the victims stomach gastric inflation during bag-mask ventilation?

Air can enter a victim's stomach during bag-mask ventilation due to improper mask sealing or excessive pressure from the bag. If the mask does not create an airtight seal on the patient's face, air can escape into the esophagus instead of the lungs. Additionally, over-inflation of the lungs from excessive bag squeezing can force air into the stomach. This can result in gastric inflation, which may complicate the ventilation process and increase the risk of aspiration.