Yes, my calendar is updated daily because I am using Exchange Active Sync. My contacts less often.
I did clear the calendar storage and the issue almost completely vanished. It will go days without the error and then one might pop up. I go to clear the calendar storage and I get another several days of FC-free tabbing.
One interesting thing though is now, every so often, I get a FC on the Samsung update service when I turn on the Tab (not wake, turn it on from being off). It's obviously going to check for updates and failing. I can still manually check for updates.This didn't start until recently.
I do agree and recommend clearing CALENDAR STORAGE and seeing how that works. (keep in mind I did a factory reset last week - not sure that needs to be part of the solution)