Hey everyone,
I just wanted to provide an update on this specific issue. We were able to investigate this issue, verify what was happening and it was addressed via patch last night. If you are still having issues, you may need to pick up that particular update. You can restart your system, relaunch battlenet which should force it to verify files and obtain any needed updates. This is specifically where exiting the Battlenet Desktop Application after launch solves the issue.
If neither the patch nor exiting the Battlenet app solves the issue, then you may have something else happening. Please follow the information here, and if necessary reply back with the requested information so the community and support can assist further.