Eating triggering instant BM

I always wonder why as soon as I start eating sometimes, as soon as I swallow my first gulp of food, my stomach cramps and I'm in the bathroom. If the disease is in the colon why does this happen when the food hits the stomach? I'm assuming I'm not the only one this happens to. The morning is usually the worse culprit for this, not every meal this happens but when it does it's such an uncomfortable feeling. Digestive nerves being triggered? Also is it normal for this to still be taking place during the healing process ? This isn't a new symptom, just had a couple questions on it.

Thanks for answering all my posts!!

Eating triggers peristalsis (google it if you don't know what it means), it's literally as simple as that. You're not passing what you just ate, you're passing whatever is stored in your rectum/colon at the time.

Yeah, the process of peristalsis is much accelerated in somebody who has an inflamed/ulcerated colon. A normal person will only need to go 1x a day on average, but somebody with a disturbed gut will usually need to go several times a day, have much more severe cramping, etc. Even if only a small area is diseased, it tends to have a knock-on effect on the rest of the GI tract.

It also takes a long time for the gut to right itself after illness, surgery, etc. It's a sensitive instrument.

I'm in remission and this no longer happens unless I eat a trigger food. Happened to me last night when I ate more cantaloupe than my gut can tolerate (1 spoon bite is OK but more than that is trouble).
When flaring many foods/drinks make this happen.

Chewing gum can start up the digestive tract too (peristalisis) but like I said, eating/chewing or not, for me I have found it makes no difference, even with just my IBS I go randomly at any time, for a while since seeing the dietitian I stopped being interrupted so to speak, for the most part, then it recently started up again, as I'm sitting eating either my breakfast, lunch, supper or snacks I get "interrupted" by having to go and have a BM, and even when I'm not eating it happens...especially between 5-7 pm my gut has me going to the bathroom...most often I have one at 5 pm daily no matter what I'm doing.