Shopify GraphQL query not working properly with after property in variable

[JD_Old7]

I am trying to search products with cursor pagination. I got first 2 pages successfully but when I am trying to fetch the third page shopify sending null data in page info. 

Here are the 3 calls I am hitting using postman. 

First CallSecond CallThird call

Here you can see in the second call I got page info as next page is available but when I passed after property value which I get from second call it not return any data. as per second call it should return data and I have checked that I have lots of products which I need to fetch. 

Any help is appreciated. Please let me know if require further clarification on the above issue.