These are both slightly hacky thoughts but,
If you changed the title to : Rebirth with a space in between the colon and the word, would that make a difference? I'm wondering if the system is recognising the punctuation as a piece of the word rather than something extraneous because of that
and two: it'd probably be a good idea to put "rebirth" in your series tags! Not the episode tags, the series ones, in the same place where you update your series banner and description. It might not show up at the top of the list, but at least it'd show up?