Repeat practice will have double solvers fighting against each other, causing it to get stuck on a quiz. It is due to the previous session solver not disabling itself and carrying over to the next session, resulting in double solvers actively fighting each other.
Workaround: The solution to unstuck them is to press "Pause solve" to stop the main solver and let the bugged background solver finish it. But it'll happen again after a few more lessons. My suspicion is due to different finished lesson pages, some congratulations, and some nagging to buy Super subscriptions. Because that problem only appears when those screens appear. Manually starting a lesson doesn't have this problem because it'll always return to the main screen.
Repeat practice will have double solvers fighting against each other, causing it to get stuck on a quiz. It is due to the previous session solver not disabling itself and carrying over to the next session, resulting in double solvers actively fighting each other.
Workaround:
The solution to unstuck them is to press "Pause solve" to stop the main solver and let the bugged background solver finish it. But it'll happen again after a few more lessons. My suspicion is due to different finished lesson pages, some congratulations, and some nagging to buy Super subscriptions. Because that problem only appears when those screens appear. Manually starting a lesson doesn't have this problem because it'll always return to the main screen.