Dears; Khan academy app crashes when downloading the following lessons: 1. Random Variables from Statistics Subject. 2. Matricies from Precalculus. 3. Matrix Transformations from Linear Algebra. I have downloaded many lessons and subjects. but, this is the only one causing the crash when trying to download it. For reproducing the bug: Machine: Xiaomi Pad 5. OS: Android 11 UI: MIUI 13.0.1 All permission were given. battery saver restriction for the app is disabled. best regards.