Yeah I TOTALLY get digestion issues. In my case, the more I walk around, the better. Unfortunately, this doesn't compute if I have to go almost immediately to the show afterward. Early or late, my body doesn't care about 'late' or 'clock' as much as it just plain doesn't do well if I go sit down for an hour. Even if I'm uncomfortable after finishing dinner at 9:30 (not because of dinner, because of my sensitivities), I still do MUCH better if I push myself to walk around, sing, go shopping, etc. after dinner.
And I would never set foot on a ship without a plethera of my handy dandy probiotics... (give me at least a lil leeway to enjoy some of the 'finer' menu items...)