When I rescan the file, it shows Lyrics? correctly...
Unable for now to rescan the whole library (after a fraction of a second, it says 'scan completed' (?)).
Yet, I regularly rescan all files.
I don't have any plugins.
And I don't have any AV-software, apart from Windows Defender (Windows 10 Home Edition), and only 'real time protection'.
I whitelisted all MB folders I could think of (Program Files/Library/Music folders/App Data...).