Eating less food and lowering your body fat stores is perceived as an indicator of low energy availability by your body. So to prevent yourself from "starving" while in a prolonged fat loss phase your body makes metabolic adaptations that promote a decrease in energy expenditure and an increase in caloric intake.
This means that the leaner you become, the less energy your body tends to expend through spontaneous activity, exercise activity, and while at rest. Overall satiety levels also tend to decrease while hunger increases over time, which can lead to a consuming more food.
This helps explain why fat loss generally slows down if you have been dieting for several months.
Don't get frustrated, its a journey, at this point vary your training programme to keep your body guessing, monitor your calorie intake and adjust as needed, remember time and consistency are key to sustainable fat loss.