Several possible triggers.
Wine. alcohol is a big trigger for IBSers
Butter. A lot of marsalas have butter in them, the dairy maybe affecting you.
Mushrooms. Just learned about these and think it has to do with my problems. Fungii such as mushrooms add to yeast buildup in the body. Your IBS may be more of a Candida problem. Excess yeast causes very similar problems to IBS, you should look into it more. Maybe triggers if you have yeast overgrowth are fermented foods, mushrooms, olives, vinegar, SUGAR, fructose, and some fruits and carbs.
Try cutting out some of that and see if it helps