When attempting to rotate an image 90 degrees of an .msg document, document viewer seems to not do anything to the document without, as you start to scroll the document the following errors can be seen in Developer Tools in Google Chrome.
GroupdocsViewer.all.js:3067 Uncaught TypeError: Cannot read property 'y' of undefined
at docViewerViewModel.ScrollDocView (GroupdocsViewer.all.js:3067)
at docViewerViewModel.scroll (eval at parseBindingsString (knockout-3.4.0.js:68), :3:97)
at HTMLDivElement. (knockout-3.4.0.js:89)
at HTMLDivElement.dispatch (jquery-3.1.0.min.js:3)
at HTMLDivElement.q.handle (jquery-3.1.0.min.js:3)
The zoom in and out buttons also don't work on this document, you can only change the current zoom with the zoom level drop down, and when you do this, the image zoom changes along with the document rotated as it should have originally and these errors no longer occur.
Also related when zooming extremely (5-15%) out of PDF and word documents, the loader can be seen behind the document and does not disappear even after all pages of the specific document have loaded.
We found this issue in version 16.10.0 of GroupDocs viewer using the based off the ASP.NET_MVC_Front_End version of GroupDocs on your GitHub profile.