I have a problem with Facebook webhooks. The page/feed webhook works fine (triggers without any problems) for any page that authenticates with my app.
But the problem is that messenger webhook works only for pages that are managed by the owner of the app, pages from other users don't work, even in development mode, when these people are added as Developers/Testers. I'm trying to create an integration for an external ticket system that will support adding messenger messages as chats/tickers on the inside. As I said before everything works fine for feed and also for messenger but only if integrated page is managed by app owner.
Is there a possibility to overcome this at all? Or is it done like this by design and won't work this way ever?
I can't seem to find anything about this, so I decided to write here, maybe someone will know something.