I have a client who is using Outlook 2013 and when she goes into her Calender the tasks for her Tuesdays will disappear intermittently but when you click away back to the mail then go back into calender it will repopulate her Tuesday tasks.

I've tried removing then adding her account back, uninstalling and reinstall office, and rebuilding her Windows and Outlook profile.  Nothing seems to fix this issue she is having. 

Anybody know of fixes or have seen this issue?

Thank you!