[Potential web UI bug?] Links added to text overflows into newly typed text

I've noticed when using Digg on the web that after I add a link to highlighted text that when I press space and type more text after Digg still shows the newly typed text as being part of the text link.

Normally on websites I will highlight text, select the link icon and then paste the link then if I press space after the hyperlinked text it'll turn white again. I mean it's no issue if you have everything typed out and add links at the end but when you're typing a reply and adding links as you create the reply it's annoying having to select the space after the text and click the link icon again to stop the new text from being linked.

Is this happening for anyone else?