Root folders missing from File Browser

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

On linux file browser doesn't recognise user created directories at /
For example /test/dir

Expected behavior

File browser lists all dir's in /
For example
/bin
/boot
/dev
/test

Actual behavior

Dir's in / are not shown in the file browser

Steps to reproduce the bug

1. Install Retroarch via snap.
   sudo snap install retroarch
2. Create a dir.
   sudo mkdir /test
3. Launch retroarch
4. Settings > Directories
5. Edit directory and select /

Also tried

• running retroarch as sudo.
• checked chown on dir which is set to root:root
• uninstall/reinstall
• running as another user
• scanned code base looking for anything obvious that would limit the display of dir's
• searched past issues + forums
  all with no luck.

Bisect Results

Fresh install of Retroarch on Debian via SnapCraft.io.

Version/Commit

• RetroArch: 1.8.6

Environment information

• OS: Debian Buster
• Compiler: N.A

Reproduce the issue using the documented Snap installation, create /test, and open Settings > Directories to select /. Start by tracing the root directory listing from that browser entry point. Done means user-created directories such as /test appear alongside /bin, /boot, and /dev on Debian when using the reported setup.