The plants are very stout and healthy, but a large part of the fruit gets the dry papery brown spots.
My Bell Peppers Develop Brown, Dry Spots
Certified GKH Gardening Expert
If the spots are on the top or sides of the fruit, then it is likely sunscald and is from too much direct sunlight. A simple shade will help stop it. If it is on the bottom of the fruit, then it is blossom end rot. This article will help with that: https://www.gardeningknowhow.com/edible/vegetables/pepper/pepper-blossom-end-rot.htm