Thank you for raising the issue.
Please create a new thread under some proper user account as it is impossible to track any threads created as “Anonymous”. When you create a new thread, please provide below details:
1) Which GroupDocs.Viewer for .NET version are you using?
2) Which exact version of IE are you using where you experience the issue?
3) Are you facing the issue when viewing all documents or some particular document(s)?
Thanks for your understanding and cooperation.