Dissolve 1 tablespoon of salt in about 8 cups of water in a large bowl. Pick through and rinse the navy beans, add them to the water, cover, and refrigerate overnight (8+ hours). Drain and rinse before cooking.
Set the pressure cooker to sauté. Cook the chopped bacon until almost crispy, stirring frequently.
Add onions, green peppers, and vinegar. Cook until the onions and peppers are semi-soft and the vinegar evaporates, scraping up any browned bits.
Add the beans, chicken stock, maple syrup, molasses, ketchup, brown sugar, Worcestershire sauce, mustard, and black pepper. Stir well. Keep the combined beans, other ingredients, and liquid at or below the pot’s half-full limit for expanding foods.
Lock the lid, set the valve to sealing, and cook on high pressure for 60 minutes. Then allow a full natural pressure release.
Mix cornstarch and water into a slurry. Set the pot to sauté, stir in the slurry, and cook until the sauce reaches your desired consistency (3-4 minutes).
Stir in 2 teaspoons sea salt. Switch to Keep Warm and let the beans rest for 30 minutes before serving.