Sorry for the late reply. Here are the logs regarding the server capabilities from the same log:2017-10-17 16:41:09 225 [syncadapter.ContactsSyncManager] Server advertises VCard/4 support: false 2017-10-17 16:41:09 225 [syncadapter.ContactsSyncManager] Contact group method: CATEGORIES
I’m not the only one to experience this issue: in fact, I reported it after multiple people complained about it online.
I am sorry I can’t see how to reproduce this issue 😕
To make it clear, I think we all use Android 7.1.2 (LineageOS 14.1) with the stock “Contacts” app, and the issue is about synchronizing groups/contacts created remotely, not synchronizing groups created from the phone itself.