iPhone contacts missing and reappearing?

[GadgetGeek407]

I have an issue I go into my text messages and numbers that were in contacts the name disappears but shows just the number, the name is not in contacts either this happened on several numbers and than after an hour its fine again, anyone else? whats causing this? i have a 5

 

[lyndeam]

Do you also have an exchange server setup on your phone? See post below that describes my similar issue and resolution. https://forums.macrumors.com/showthread.php?p=16005803#post16005803