Microsoft Copilot Android App Reads Hidden Code Aloud Due to TTS Pipeline Bug

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A developer has identified a bug in the Microsoft Copilot Android app where the 'Read Aloud' feature vocalizes random alphanumeric characters and punctuation not visible on screen. The issue stems from a sanitization failure in the background script that feeds text to the Android speech synthesis engine, allowing raw delimiters and system syntax to bypass filtering. This causes the text-to-speech engine to break its natural cadence, resulting in irregular playback speed and pitch. Notably, the on-screen UI displays clean text, meaning the flaw is isolated entirely to the audio delivery pipeline. The proposed fix involves strict parsing and stripping of the text payload before it reaches the TTS engine to prevent any internal syntax or hidden symbols from being processed.

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