It is amazing that none of the seed packets or catalogs address the intensity of heat that we have inland in South Georgia. Our bell peppers had a similar experience as our eggplant and it was a challenge to keep them alive during July, August, and September. I wondered during that time if I was going to lose the plants, even with watering and the protection from the mulch.
Finally I dug up four plants and put them in strawbales that I conditioned a couple months earlier. The bell pepper blossoms took off and the peppers grew beautifully in the partial shade!
We are taking notes on how much sun brightens our partially wooded areas so that we can plant there in 2018.