Why do my contacts keep disappearing and then later reappearing?

[Android Central Question]

Sometimes my contacts cannot be seen on my phone. they just seem to have vanished. Then, some time later, they come back again....only to vanish again at some time before reappearing. What the hell is happening?

 

[belodion]

What phone?

 

[David_Crawt]

The phone ia an ALBA 4