Viber Contact Sync Issue on Z10STL100-1/10.3.0.1154

I have installed latest viber from snap on my Z10STL100-1/10.3.0.1154.
It starts, got activated too. Can call and chat. Big issue is it do not get completely sync with address book. I have over 2000 contacts using google, facebook,and linkedin contact book. I do not have any contact in my local and sim book. Viber only shows 142 contacts using viber inmy contact list. Even I can't see few family members and friends in viber contact list who are actually on viber.
Can anyone advice how to get viber address book sync completely with contacts on Z10?

Posted via CB10 on Z10STL100-1/10.3.0.1052

I have the same issue, I don't remember what OS version... try to modify the phone number on contact-> save->modify back->save again.

Posted via CB10