I notice this at the end of my cycle (luteal phase). I think I retain more water. And I have a bigger appetite. It’s really frustrating. Last week I didn’t lose any weight (gained half a pound actually) but the 2 weeks prior I lost 2-3 pounds each week. All while keeping to the same habits and calorie counts. I started adding Tabata to my workouts (I do cardio 4x/week) since that’s supposed to help burn fat efficiently. Just keep at it!
OP, I am 5-1”. I went 22 days fasting w doc supervision, on veg broth 2x daily ( about 200 kCal total per day), and with basically pure no eating fasting, I only lost .25 to .33 lbs of bodyfat per day. Just want to say being petite means your weight loss numbers look smaller compared to tall people but no less mighty! You’re winning, really!
Perhaps it’s time to change up your fasting protocol, at least for a little bit, to see what happens. Maybe your body has adapted to the pattern you have set and you’d benefit from a feast/fast pattern like 5:2 or 36 hr fasts. I would also suggest checking out youtube videos from Dr. Eric Berg or Dr. Jason Fung - their channels cover a lot of ground.
I do agree w/ other posters about cycle phases having an impact on plateaus and that weight loss isn’t linear. I also found tracking waist, hip etc. measurements (vs weight) more informative of my progress but to each their own. Good luck!