Cannot rename a directory in a namespace

[TheColdPot]

My workspace is like

|- function
|  |- foo
|  |  |- bar.mcfunction
|  |- another_namespace

As I try to rename foo to baz, for example, vscode fails to do the operation. It takes quite a while for the notification "Renaming foo to baz...", however it finally comes to an error, Error: EPERM: operation not permitted, rename 'e:\fakepath\foo' -> 'e:\fakepath\baz'.

Is this a bug or something caused by myself? How can I solve this?

[TheColdPot]

This problem is issued by #1414. However, renaming files are possible.