Default [Q] Calendar Loses Data On Sleep

Last week my Galaxy Note 10,1 2014 started losing Calendar data when it went to sleep. All events and schedules would be blank.
Syncing the Calendar didn't help, but a reboot always restored all the data.

I thought it was the Samsung Calendar, and installed the Google Calendar, it does the same thing.

Neither my Galaxy S4 phone nor my Tab 3 7" Tablet have this issue, only the Note 10.1.

Is anybody else having this issue?