Rebound weight-gain, that is weight regained after a diet, is widely called, 'going back to your old habits', but really why would you?
You've been blown away by the sometimes astounding power of your appetite, pushed around by a body determined to thwart your efforts by almost any means available to it. tormented at every turn by exhaustion and boredom, and you've slowly grindingly managed to lose some weight; often over a period of weeks or months, sometimes years, why the hell would you go back to what apparently prompted all your efforts in the first place?
What you associate with all this suffering is what you would go back to, are you crazy? For what reason?
Your experience of your appetite and hunger may well have totally changed, for some for a while anyway, it may have calmed down considerably as I mentioned in stage two; it is what a lot of fat haters assume always happens all time when you restrict calories, they especially believe this with training the appetites of children. In truth it can occur, although it's as unpredictable and almost always temporary. What is predictable is that regardless of sometimes totally different experiences , failure is virtually inevitable. All tend to end up more or less back where they started, eventually; that is short to medium term, very rarely does it take that long.
By dieting, you are declaring a war you will almost inevitably lose, on the very rare occasions that you somehow don't, are such an anomaly. The figure so often quoted is 95% failure, that means, every time you diet, you have a 95% chance of failure, that means out of millions a tiny number will succeed, and most others could spend a lifetime of never succeeding, that is as much a fact as the fact that there are and continue to be fat people.