I wish I had a camera on my gut! Seems the only way to really know what's going on. I don't avoid fiber, try to get lots, but I am afraid of anything that has a greater chance of not being fully digested - like corn, seeds and nuts - and might therefore be mechanically difficult to pass. Interestingly, colonoscopies showed diverticulosis for at least the last 13 years. Not sure what catalyzed the switch to diverticulitis. (Covid?) For years, the mainstays of my diet were beans, nuts, seeds, dried fruits, whole grains, fruits, veggies, and fish.