Forward template

Good day.

New day - new question :).

Question about forward template.
I have standart forward template. I have $MessageBoxRichText = 1. In forward template I add ‘Content-Type: text/html’.

When I push “Forward” on transaction I see the Forward.html with RichText message box, where I add some additional text. Then I push button “Forward message”. And in received mail I don’t see my additional text. But when viewing the message sources I see this text.

I delete ‘Content-Type: text/html’ from forward template and after in received mail I see my additional text with html tags.

it can be fixed?