Usually, This works normally without stating any issue where i believe. There is possible answer could be
1) May be missed delimiter in between fields so then it occurs the country and/or user to non associate
2) Off course, try to use Table box to check and then see where you are facing the issue using filter for specific country
Best Anil, When applicable please mark the correct/appropriate replies as "solution" (you can mark up to 3 "solutions". Please LIKE threads if the provided solution is helpful