I'm not sure if this really qualifies as a bug, but it's a little strange regardless: Ultra endings give extremely low final scores compared to regular wins.

My understanding is that the final score calculation gives a 2x bonus to your total score for closing the gate, then gives a bonus for turncounts below 80000, then gives another 2x bonus to your total score for exiting the Chain victorious. I suspect that a similar mechanic was not included for Ultras, meaning that an average Ultra will end up with roughly a quarter the expected score of a closer. AFAIK, Ultras don't get any points for turncount even if they are below 80k. Considering the extra time and effort required to get an Ultra, it might be nice to see a corresponding reward in the final score.