Hello. I have a single page email that renders correctly in the ModrenUI sample until I upgrade the GroupDocs.Viewer nuget package to 18.6.1.
In 18.3.0 it renders as a single page of HTML, in 18.6.1 it renders 5 pages with the same content repeated.
I went back through the nuget releases 18.6.0, 18.5.0 exhibit the fault. It works OK in 18.4.0
In version 18.4.0 in the cache I get fd.xml describing a single page 816x1056 and page1.html and it renders in the viewer in the Modren UI as a single page with all of the content.
Using nuget to upgrade the modren UI solution to GroupDocs.Viewer version 18.6.1 I get an fd.xml file describing 5 pages (all 612x792) and page1.html through to page5.html with the same content.
The only change I have made to the ModrenUI example is to set HtmlOptions.IsResourcesEmbedded to true.