FIXED - iPadOS bug loading audio files from Music library (ex iTunes library)

This bug has been fixed in version 7.1.2 which has been released on November 6th 2019.

Please note that there is a bug in new iPadOS.
If you want to load audio file from Music library (ex iTunes library), sometimes empty window opens on screen.
Hopefully this bug will be fixed soon.

The only workaround solution for now is:
- go to Setup section,
- tap Settings,
- change first setting Library Source from ITUNES to DOCS,
- now you will be able to load audio files from app Documents folder and Dropbox.

Users using iOS 12 or older are not affected.