ID= removed by urlinator?

It’s from the sanitize_html_attributes() function in b2-include/b2functions.php. That function does global replacements, instead of trying to ensure that it only affects attributes on HTML tags.
I’m going to try integrating a smarter HTML cleaner one of these days, but haven’t had a chance to start working on it yet. I’ve already found a project that does what I want. It just requires some work to integrate it into WordPress.