I found what the problem is.
When importing my contacts to my nextcloud server, I didn’t pay attention to the fact tha all my contacts have a text “tel:” prefix.
Removing this part resolve the synchronization problem.
I found what the problem is.
When importing my contacts to my nextcloud server, I didn’t pay attention to the fact tha all my contacts have a text “tel:” prefix.
Removing this part resolve the synchronization problem.