Feedback stopped before it finished
What the user saw
After a wrong answer, the next question could start while the spoken explanation was still playing.
Why it happened
The next question timer began when audio playback started, not when the explanation ended.
What the real fix did
The app now waits for speech to finish before scheduling the next question.
This issue is worth 2 points: the real fix changed 122 source lines. Models fixed it in 14 of 16 recorded runs.
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