Question about plateauing

I’m about 6 weeks into Mounjaro and doing well - about 14 pounds down. I’m a little confused when I read posts on here about people who are plateauing for relatively long periods of time. In general, does this happen to people for some inexplicable reason or is it just because they are taking in as many calories as they are burning?

I’m assuming that if I maintain a consistent daily calorie deficit (of about a thousand calories), that there won’t be any sustained plateauing. Is that accurate to say or am I missing a nuance? Not trying to question the people that have plateaued- just wondering if there’s something else I should watch out for. Thanks.