I'm glad to see so many people in the maintenance subforum don't struggle with this, but I've not been so lucky. I wonder if it has something to do with how much weight I lost (~28% of my starting weight!).
I haven't been helped by hitting goal right before Xmas, and having two trips since then. I haven't really settled into a maintenance routine, and it would have been nice to have that sorted before the temptations came into play.
As for weight coming off quickly, after Xmas the first of a few kg came off quickly then I sort of stalled. The weight after the two back-to-back trips--time will tell, but doing ADF and now something like 16:8 on non-fast days has led to 1.5kg coming off quickly. I am now 2.7 kg above goal weight.
I've been going on in a lot of threads about "starvation mode"/"famine reaction"/adaptive thermogenesis in relation to weight plateaus and the difficulty of maintenance, but I want to make clear, I have no idea to what extent that has been a problem for me. Since Xmas I've been very weak around sweets and really overdoing it on non-fast days for some reason. I don't think my appetite has increased greatly--I'm not doing this because I feel crazy hungry or something. I.e., there's a very obvious explanation for my weight gain: I presumably haven't been in calorie deficit. Maybe my TDEE is lower than it should be based on weight loss alone, but I don't have any quantitative evidence for that (I'm trying to track calories on MFP, but too much of what I eat, particularly on non-fast days isn't easy to enter--I'm just making guesses and trying not to underestimate).
Anyway… I'm hoping the 16:8 on non-fast days keeps me from eating a calorific but low nutrition breakfast (muffin plus latte, usually) and from snacking in the evening. I'm hoping this, with fasting (ADF or 4:3), is enough to get back to target, or 1-2 kg below for good measure, so that I can finally start a proper maintenance plan.
Sorry for the long-winded response. I hope it's helpful to someone!
edit to add something more positive: In the grand scheme of things, the little gain I've had is nothing (as long as I get it in check, which I feel confident I can) and I'm still ecstatically happy about my progress last year, if a bit frustrated by my problems this year. The clothes I bought at Xmas all still fit. I'm keeping up the exercise, and am not tempted (don't have time) to overdo it. I WILL figure this maintenance thing out eventually…
edit to add a bit of humor: I'm spotting a trend here. Maybe I should change my name to AnnieP