xamarin forms await is not respected

Good evening,

Can someone tell me why the code below does not respect Wait, in debug the output order is

1. init save
2. End Save 3. New header ID: 1

instead of:

1. init save
2. New header ID: 1
3. End Save

public async Task Save(Ticket header, TicketLines newLines)
{
                Debug.WriteLine("init save");
                await dbConnection.RunInTransactionAsync(new Action<SQLite.Net.SQLiteConnection>(tran =>
                {
                    dbConnection.InsertAsync(header).ContinueWith((t) =>
                    {
                        Debug.WriteLine("New header ID: {0}", header.Id);                       
                        foreach (var item in newLines)
                        {
                            item.DocumentId = header.Id;
                        }
                        dbConnection.InsertAllAsync(newLines);                     
                    });
                    //tran.Commit();                    
                }));
                Debug.WriteLine("End Save");

}

I want to call the Save method and in the end I command refresh the screen, what happens as it does not respect the Await I have to refresh the screen and still not insert the data