XML-description on custom nodes is buggy

Hi, all
I encounter with strange problem - when I import my custom node to Dynamo Sandbox (version 2.8.0.2015) all description is visiable [look screen below]


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

(https://github.com/DynamoDS/Dynamo/issues/11148)
Version of Revit - Dynamo Core 2.3.0.5885 Dynamo Revit 2.3.0.8352
Inspite of fact, that it Case already was published on GutHub - I want that problem was publishing also here