Hi,
Or you may try try update to this beta firmware(M6:fiio-file.fiio.net/M6-ota-20200403.zip ), then uninstall the emmbeded FiiO Music app, and use the standalone release version and check again:
Click here
Update note:
1. Added grouping tracks by Album Artist category ;(You can select the Artist or Album Artist in the Settings->Artist List Display. This upgrade requires a database update, please scan for music again)
2. Added support for uninstalling the FiiO Music, ES File Manager, Gallery apps (now you can uninstall the embedded FiiO Music and install the standalone release version);
3. Miscellaneous bug fixes.