Since a few days I recognize *.wav-files no longer being detected by a "new & changed scan" (most recent scan with Logitech Media Server Version: 7.9.2 - 1554891466 ) - before they did.

Did anything change or could there be any reason for this behaviour?

I just had a look into

Settings => Advanced => Disabled Audio File Extensions - this is left empty.
Any other ideas or settings where they could be excluded/disabled?