Cook the bacon in a large Dutch oven over medium-high heat, until crispy. Remove with a slotted spoon and transfer to a plate lined with a paper towel. Leave the bacon fat in the pot.
Sautee the chopped onion, carrots, and celery in the bacon fat until tender, about 6 mins.
Add the diced potatoes, fresh thyme, paprika, red pepper flakes, and corn.
Pour in the chicken broth, heavy cream, and milk. Simmer for 15 mins. Season with salt and pepper.
Make a slurry dissolving the cornstarch in a little water and add it to the simmering chowder. Simmer, stirring constantly, until thickened, about 5 mins. Serve hot with crumbled crispy bacon on top.