In a pot, place the bacon in the cold pot and turn the heat to medium. Cook bacon stirring frequently until crispy and fat has been rendered, 6-10 minutes depending on thickness of bacon.
Once the bacon is crispy, remove from the pot, drain on a paper towel lined plate and set aside.
Add the onion, celery, potatoes, salt and pepper to the pot. Cook until they start to soften and the onion turns translucent.
Add the garlic, thyme and bay leaves. Cook for 1 minute. Add the flour and cook for 1 minute.
Add chicken broth, bring to a simmer and add the chicken pieces. Cook until the chicken is cooked through and the potatoes are tender, about 12 minutes.
Once chicken and potatoes have cooked through, reduce heat to a simmer and add in the milk and corn kernels.
Remove from heat, whisk in the Greek yogurt if using, remove bay leaf, taste for salt and pepper, and serve with the bacon crumbles for garnish.