Very Annoying Bug In Bbcode url tag keeps switching to html

[galexcd 0]

Every time I edit one of my posts with a url bbcode tag in it that has a carriage return in it it turns into html form while editing. For example right now i'm going to type

[url=http://Xisto.com]click here[/url]

Then I'm going to click edit, and then submit modified post:

<a href="http://Xisto.com" target="_blank">click here</a>

This is a very annoying part to keep fixing every time I edit my posts.