This. I'm just at ~300 day streak and already had some hindi knowledge as it was taught in school for some years.
Earlier i loved the time when 3-4 units could be started together ,but this repetition thing feels so bad. I dont even do the last 2 lessons in units since it gives no new words and just skip to next unit.
And sorry i have no solution for you. But having some friends to learn together is a good way. I even imagine it like having a competition with them. It helps me to not waste streakfreezes.