[Windows] QAudioDevice isFormatSupported no longer working

I use libsndfile to decode audio files and feed them to a QIODevice got from QAudioSink::start.

This has been working up to Qt 6.8.1 (and like 20 versions before) but no longer working since Qt 6.8.2. This is happening only on Windows.

Basically the call to QAudioDevice::isFormatSupported always returns false and pushing data setting QAudioDevice::preferredFormat doesn't produce any audio output.