Why Easy workout is harder than Medium workout?

I'm on my first mesocycle in Dr. Muscle, so it might be that the AI will correct this in the future cycles, but I feel strange that the Easy workout is way harder than the previous Medium workout. For example, in one exercise I managed 7 reps with 90 kilos in Medium workout (with 1-2 RIR). The AI suggests that I'll perform 11 reps with the same weight on the following Easy workout. On another exercise the weight was again the same, and the reps were 7-11-12 (Medium-Light-Heavy). 

I would understand higher reps with a lighter weight on a Light workout and lower reps with a heavier weight on the Heavy workout. But now it gives me the same weight throught, and the target reps are higer on the Light workout than what I was able to perform on the Medium workout.