In a large Dutch oven or heavy pot, cook the bacon over medium heat until crisp.
Transfer bacon to a paper towel–lined plate. Pour off all but 1–2 tablespoons of the rendered fat.
Add the onion, celery, and potatoes to the bacon fat. Cook over medium high heat stirring often until the vegetables are softened but not browned, about 8–10 minutes.
Stir in the garlic and cook 1 minute more, until fragrant.
Sprinkle the flour over the vegetables and stir well to coat. Cook, stirring constantly, for about 2 minutes.
Slowly pour in the cold heavy cream while stirring constantly.
Once the cream is incorporated, gradually stir in the warm corn broth. Stir until everything is well combined.
Stir in the corn kernels, a pinch of cayenne and half of the crisp bacon. (The remaining bacon will be for garnish.)
Bring to a gentle simmer over medium-high heat, then reduce to low and cook until the potatoes are tender and the chowder has slightly thickened, about 15–20 minutes.
Taste and adjust flavor with salt and pepper.
Ladle into bowels and garnish with freshly cut chives, bacon strips and oyster crackers.