Personally I don't have any digestive issues from mine but I know lots of people do! Dysautonomia can affect many systems including the digestive track, so whatever you're experiencing may very well be because of it

YES. i've had them nearly my entire life.

ALSO YES. I think its called gastroparesis. My nerves don’t signal to my stomach to start digesting which it kinda does by flexing in a “wave” to crush food. (This is how I understand it. I might be wrong) but this causes me to eat something but vomit up unprocessed food even when its been an hour since I ate. I assume something similar is happening in my intestines as well for a similar reason.