The distinction between chat and email and forums was helpful mentally to compartmentalize - you’d expect people to act differently (forums even have things they call “chat” threads that are more like chat).

The problem the “bubble up to Wiki” is that you need a specific subset of people with the technical know-how to understand the issue and solutions AND the time and desire to update the Wiki.

One thing that can help is being absolutely a tyrant and insisting that discussions about bugs, etc happen on a bug tracker- or at least the resolutions go there.