Unfollow from and to Friendica and GNU Social doesn't work
Following a Pleroma account from Friendica or GNU Social does work great. The opposite does work as well.
The unfollow doesn't work in any direction, neither with GNU Social nor Friendica on the other side.
I haven't yet checked if the unfollow from Pleroma to Friendica sends a message at all. I will update the issue with more information if available.