Can't customize medialibrary folders with new onboarding

Description

When going through the new onboarding wizard, I can't customize my medialibrary folder and always end up with the default folders being scanned.

I should be able to select the folders I want to analyze and confirm visually that only those are selected

I can select a folder but can't validate it, the only way out of the browser appears to be the 'close' button, which seems to discard my selection.

Clear data
Launch VLC
Click start -> grant permission -> allow
Select Customize
Browse to internal memory
Select a single folder
There's no way of validating the selection: closing the browser discards the selected items, and using the play button seems to attempt to start a playback

Selected folder:

After closing the browser it seems that my selection was lost, as 'Internal memory' should have been partially ticked.