On our customer portal, it doesn't seem to update the issue type and the original description is missing from the comments thread. I have spent ages going through the configuration settings and I can't work out how to change this.
E.g. we have 5 issue types but all issues when viewed through the customer portal show as the same issue type regardless of what their actual issue type is.
e.g. I can see all correspondence on the ticket except the original query from the client when viewing the ticket from the customer portal.
