Keyword here is two platforms.
This needs to be addressed by ethics. The audience shall know the difference between short talk and long discussion based on the type of topic they’re raising. I’m personally involved in many communities that integrate with products like slack & discord for instant chat but more often than not, both carry out a totally different subset of conversations with formal ideas and announcements taking place on discourse for better record keeping and informal conversations taking place on chat so that it is lost with time.