Contact ringtones not working? Anyone else?

Hey all. Just noticed that all my ringtones I set for specific contacts are not working. When they call my default ringtone plays. I've already tried using all the custom ringtones set as default ringtone with no problem and there doesn't seem to be any issues with the file names or types.
Anyone else having problems with this or mind giving it a shot to see if its not just me. Thanks

Contact filter

Does anyone know where to filter contacts? Usually there is some setting to only show ones with phone numbers for example

Sent from my Nexus 5X using Tapatalk

[Q] Modifying Facebook APK to allow contact syncing

I am wondering if there is a way to modify the Facebook APK to get contact sync working without modifying ContactProvider.apk as I am using a non rooted phone and don't want to root just for this. In the past I have used HaxSync but with the latest Facebook APIs that no longer works.

Is it simply a case of adding the WRITE_CONTACTS permission to the Facebook APK and if so is that (easily) possible?

Thanks for any help, if there is a better subforum for this type of thing please let me know also, thanks.