Bug with Default theme Plugin?

I have a multisite with about 3-4 new registrations with site-creations pr day. After I updated to WP 4.4 I had to deactivate the "Default Theme" plugin because it seamed to mess up the permalinks for the new sites that where created. I cant figure out why, but when i deactivated the plugin the problem disappeared. So i send you this message to let you know of my bug in hope that you figure out why :slight_smile:

I love the plugin so hope you figure out what the problem is and that my message can help in some way