It seems that I have the same problem as others describe here:
The notifications get delivered fine by mail and the post-by-reply is delivered to subscribers as well. But it’s only the reply to the first topic that is showing up in the forum. I have tried both in an existing forum and in a brand new forum.
The test connection is working and I use the webhook (manually at this moment while testing).
I’m testing at a staging site at Kinsta hosting.
I really hope you can help me fix this.