trying to set my computer to show some folders to users without login (for movies and music) with my credentials i turned off password protected sharing on the windows machine and set permission to ''anyone'' on the media folders, while keeping my personal folders with my user permissions.
if i turn on password protected sharing, VLC app logs in with my credentials, giving me access to my private shared folders, if i turn off password protected sharing (so others can connect to ''anyone'' folders) the VLC on my phone stops seeing the private folders, other aplications (like my file manager) have no problems with ''anyone'' and private shared folders when switching password protection.
A wild guess is that VLC does not attempt to authenticate if windows is not asking for credentials, when it should attempt to login if it have credentials for that smb before going ''anyone'' mode
summary:
VLC with already stored credentials ignores them if the windows machine is set to not ask for credentials on shared folders.