Crashes during ALL reviews – Learn Japanese!! Review

Critical, reproducible crash bug. A Hiragana module can be completed, but if I try to review it, it crashes halfway through. If I “Review all”, or “All Overdue”, it crashes right away with the first right answer. This is on iPhone XR, with both iOS 13 and iOS 14.1. I paid $7.99 for all content, but haven’t gotten a response from the developer. Amazing app, will give it five stars if this can be fixed. Heartbroken. Unusable!
Review by James91g on Learn Japanese!!.