You need to provide more information…
From the How to Write a Good Bug Report pinned thread at the top of the forum…
If you have steps and can reproduce them consistently, write them out. This will help Quality Assurance get a must faster turn around time reproducing the issue and reporting it to the Diablo III developers.
Finally, it always helps to attach a link to Imgur (or another picture hosting site) that displays a screenshot of the bug. If you need to include a video, link to a video as well.