- Go to your profile page and enable opening external links in new tab
- Add a comment with a link to external website or add such link to the description
- Open the "Activity" tab for the issue or navigate to a dashboard with Activity Stream gadget
- Click the previously added external link that now has appeared as an item in Activity Stream
External link should open in new tab, as they do inside comments, for example.
Clicking on the link in Activity Stream replaces the current page.
Currently there is no known workaround for this behavior. A workaround will be added here when available