@pfefferle @jan Hi Matthias, since you're here. I use the plugin on self-hosted WP (@info), and had comment moderation activated. That lost me some interactions that never showed up on the blog.
I think someone replied to the not yet approved comment in the instance where it was made, but since the comment wasn't on the blog yet, that reply got lost.
It was on an earlier version, though. Might have solved.