As stated in release notes for JIRA 7.3.x here, there is new Description field, developed in Atlassian Labs.
Now I have a problem with rendering contents on Visual tab, even though I have my content properly displayed on Text tab.
Quick workaround is just to try editing something on Text tab and Visual tab will properly initialise and render proper content.
Since I am just pasting some content on Text tab automatically (via Add-on), I would like to know if there is some additional actions like some initialisation, which I need to call after I pass content on Text tab, in order to Visual tab properly render it?