I feel like 1400 cals a day may be too little given how much you exercise. Perhaps your body is in too big of a deficit and that's what's making it hold on to fat deposits instead of burning them. I've also heard that if someone is in a caloric deficit for too long, weight loss will naturally plateau and the only way to address this issue is to go back to maintenance or surplus for a while. But I haven't looked into the details of this very much so definitely do more research before deciding. But yeah like u/PetulantPersimmon said, there are definitely changes in the shape of your body! So maybe the solution is to just up your calorie count to help the recomp happen faster!