Hi and welcome to HCM.
This is probably nothing. There can be functional motility disorder
without obvious reason so it shouldnt concern you if you dont have any symtoms. But also some hormonal
and methabolic imbalance can cause it as well. I suggest to do basic blood test
to rule this out. The third option is some intraabdominal pathology which can be more or less serious and it can be found only by endoscopical methods.I siggest to try change dieatrry habbits as there can be some food allergy
. If this isnt helpful you should do tests i ve mentioned.Wish you good health.