order - viewCount is showing wrong results in "YouTube API v3"

I am trying to get videos of a particular channel (like :- Luis Fonsi) in highest views order. And I am passing order parameter to sort the response by viewCount

like :-

order=viewCount

URL :-

https://www.googleapis.com/youtube/v3/search?key=[MY-API-KEY]&channelId=UCxoq-PAQeAdk_zyg8YS0JqA&part=snippet,id&order=viewCount&maxResults=20000

When I try to run it then It is not sorting as I expected. I was expecting first song would be Despacito But It got another one which definitely don't have the highest views.

As mentioned in Youtube-API Documentation in search section.viewCount – Resources are sorted from highest to lowest number of views.

It is not working like this.

I have tried many times but it is still not working.

Any help would be much Appreciated.