I'm not sure anything from this instance is federating anywhere since this change.
Looking at activitypub, attempting to subscribe to something gets no reply (the screenshot below shows me trying with 3 different communities, followed by what's expected to happen with a random community on another 0.19 instance)
Looking at an active community (like nuclear@feddit.nl), there's been 6 posts in the past 2 days that aren't showing up anywhere else (at /c/nuclear@feddit.nl)