bbcodes in vbeditor don't work correctly

[biocyberman]

After upgrading to 3.8.4 PL1 from 3.8.3, default bbcodes. For [URL] bbcode, when selecting text to insert hyperlink, the selected text get replaced by the link like this:
If I have this text:

Please CLICK HERE to visit vBulletin.org

Now I select "CLICK HERE" to instert a link to www.vbulletin.org.
After typing www.vbulletin.org to the text box of the dialog box, the "www.vbulletin.org" replace "CLICK HERE" so resulting in this link:

Please http://www.vbulletin.org to visit vBulletin.org

Instead of this:

Please CLICK HERE to visit vBulletin.org

. [HTML] [PHP], etc also behave the same, text get deleted when selected before hitting bbcode buttons.

To avoid this one has to hit the bbcode button first to get the tags placed on the editor and then put text between the tags. That's very counter-intuitive for many users.

Any help his much appreciated.