V24.06.26: Audio quality loss for .wav files

That is a bad description of the problem, which is why I found this confusing and did not accept it as a bug. Stereo is not being downgraded to mono. The problem is that mono WAV files may not be automatically repeating its single channel across both channels of a stereo setup (Settings > Audio Channels) as mentioned here:

It is fixed for the next version 24.08