Qt/discover: 'no filename' notifications

If I simply open VLC and then click on the 'discover' tab I get a bunch of 'no filename' notifications in my terminal.

(Tested at 32ceab21).

./vlc -vvv output:

...
[000060e000000040] main libvlc debug: configured with ../configure  '--disable-xcb' '--disable-skins2' '--with-sanitizer=address' 'LDFLAGS=-lasan'
...
[00007ffde0d873e0] main generic debug: looking for medialibrary module matching "any": 0 candidates
[00007ffde0d873e0] main generic debug: no medialibrary modules matched with name any
[000060e000000040] main libvlc warning: Media library initialization failed
...
[00007ffde0d874a0] main generic debug: using interface module "qt"
[00007f979f1c70e0] main generic debug: looking for services probe module matching "any": 8 candidates
[00007f979f1c70e0] main generic debug: no services probe modules matched with name any
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
[000060c0000184c0] [qt] qt generic warning: qml error qrc:/widgets/ExpandGridView.qml:598 TypeError: Cannot read property 'focus' of null

I also see a couple of these entries on the 'browse' tab.

Debian Sid.