Interesting re: GitHub - I thought I had that automated, but see you're right. Resynced to 0.8.15 just now. I see your pull request and am taking a look now as well. Expect a 0.8.16 soon.
Moving this convo to the PR, however, the reason I didn't catch this in testing is all my test worlds are multiplayer, which always has additional players for one reason or another. Single player doesn't. Heh.