Public subreddit not listed in "Growing Communities / Rankings"

When looking at Growing Communities that I moderate, all of my public subreddits are listed/ranked but 1. I have checked every setting possible, and can not find out why.

r/DonaldTrump is the subreddit, and the rankings page I am looking at is https://www.reddit.com/subreddits/leaderboard/moderating/ - The subreddit is listed with a "--" under "today's rank" and "0" under "change", just as other private subreddits are listed.