Is federation with 0.18.x instances working?

I've made some comments and posts on a community on another instance, and I just realized they're not showing up on the other instance at all. Eg. I made this comment on !suomi@sopuli.xyz, but it's not visible on the original instance. The same has happened with all comments and posts I've made on sopuli.xyz for the past few days, which leads me to believe it's due to sopuli upgrading to 0.18