Do extroverts loop?

It seems to me any time looping is reference its an introverted loop. Ni-Fi, Si-Fi, and so on. And it makes sense, too, because once you get caught in an introverted loop, it’s all internal. Your introverted perceiving function and introverted judging function get caught referencing each other with no external factors to redirect or confirm/deny beliefs and actions. In fact the way to break a loop is to focus on your extroverted functions.

But if you’re already in a loop with extroverted functions, what does that look like, and how do you fix it?