Contacts not working in Widget - Samsung Note 2

[AC Question]

Hi, I'm using Samsung Note 2 and I had this Favorite Apps 4 x 4 from the widget to one of my screen. There are 6 contacts in that panel and two of them shows "Contacts not found" when I click them. If I go to the contacts, I can dial those numbers. I need to remove the two contacts from the Favourite and reinstate again and it works. But after some times, it comes back with the same error message.
Pls help.

Thks & Rgds
Jennifer, Singapore