I did not have a chance to test this with Discourse version 2.9.0 beta3, so I cannot speak as to how this was working in previous versions, however, I did confirm that div tags do not appear to be formatting in topic posts on version 2.9.0 beta4.
I did not have a chance to test this with Discourse version 2.9.0 beta3, so I cannot speak as to how this was working in previous versions, however, I did confirm that div tags do not appear to be formatting in topic posts on version 2.9.0 beta4.