@Riccardo, you need to verify how do you configured owncloud server. You need to configure it to sync to a new address-book and not the default one. Otherwise you will create conflicts with google account that could cause this kind of problems.
@Riccardo, you need to verify how do you configured owncloud server. You need to configure it to sync to a new address-book and not the default one. Otherwise you will create conflicts with google account that could cause this kind of problems.