XML-description on custom nodes is buggy

Hi, all
I encounter with strange problem - when I import my custom node to Dynamo Sandbox (version all description is visiable [look screen below]

but when I try import it to Dynamo Revit it return me an error:

Version of Revit - Dynamo Core Dynamo Revit
Inspite of fact, that it Case already was published on GutHub - I want that problem was publishing also here