Cook the pasta according to package instructions until al dente. Drain and rinse under cold water to cool completely. Set aside.In a large bowl, whisk together the mayonnaise, barbecue sauce, apple cider vinegar, and a pinch of salt and pepper until smooth and creamy.Add the cooled pasta, cooked chicken, crumbled bacon, corn kernels, diced red bell pepper, diced red onion, shredded cheddar cheese, and sliced green onions to the bowl with the dressing.Toss everything together until well coated and evenly combined.Cover and refrigerate for at least 30 minutes before serving to allow the flavors to meld beautifully.Taste and adjust seasoning with additional salt and pepper if needed before serving.