Path with space breaks "open externally" on folders

Just observed this on a fresh windows 3.20 installation (could also reproduce it on 3.18.3).

When opening a folder with an external program (RMB::Open Externally on a folder) unexpected behavior occurs when there is a space somewhere in the path.

Normally it opens "windows explorer" in the correct folder (the selected one).

If there is a space somewhere in the full path a command prompt is opened with the following noteworthy properties:

• The current folder is: C:\Windows\system32>
• The window title shows: Username: PathToSelectedFolder

Please note: Opening normal files (png, txt, etc) are opened just fine regardless if there is a space in the path.