Typical symptoms of rumination syndrome include a cycle of regurgitation followed by swallowing of the regurgitant during or after meals, with this continuing until the regurgitant
[ueg.eu]
[…] gastroparesis include feeling full from small amounts of food, nausea, vomiting, reduced appetite, abdominal pain, heartburn or gastroesophageal reflux disease (GERD), and regurgitation
[badgut.org]
In diabetic and idiopathic gastroparesis the symptoms can be heartburn with bloating, feeling full soon after starting a meal, nausea/vomiting and regurgitation of food are
[gutscharity.org.uk]