I've had similar experiences. I've been doing 16/8 for about 2 years. I finish up dinner by 6:00 and don't eat again until noon the next day typically. So typically I'm doing 18/6. Have lost 20 pounds and 6% body fat. Like you I kicked indigestion and the need for naps to the curve. It's been great. But I was reading today about chronobiology and circadian rhythms and all that and a lot of folks out there make a case for eating breakfast early. One thing that hasn't been going well is my cholesterol. It used to be 140-180 and now it's 200-210. I eat quite healthy when I do eat. Some links speaking to how it's healthy to eat an early breakfast.

https://www.sciencedirect.com/science/article/pii/S0735109717393178

https://www.washingtonpost.com/lifestyle/wellness/many-intermittent-fasters-skip-breakfast-heres-why-thats-not-a-good-idea/2018/10/23/976aba7e-d311-11e8-83d6-291fcead2ab1_story.html