Tagging users

Hi.

I’m using the deafult text editor for answers, without any options to write:

If I tag an user writing:

@userName someText

It works, example:

But if I write:

SomeText @userName someText

The first text is without space with the user name:

If i write 2 spaces between the first text and the username it works:

SomeText  @userName someText

I don’t know if it is a bug or not.

Thanks.