Playing randomly a folder of folders of audios seems incorrect as some folders seem far more played than others

In fact it seems that some folders are not loaded:

nemo:

vlc:

After clicking on Basto (note that no Basto music is then directly played):

Could count number of folders opened by default. Firstly 13, then 9. Maybe should count the number of musics (about 52 this time) or a music is stopping the discovery due to file name, actual content or number of treated folders/musics.

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