Weird Behavior of CRM Web Api

We are using Dynamics CRM Online and it's Web Api for our integration with other systems, we have hit a really weird issue recently, where two Get requests to Web Api, issued at exactly the same time with same Authorization token are returning different results, we are querying guid of a record, one comes back with the Guid the other with Null, there's no chance of that data not being there at that point as that record has been in CRM for a long time and as I said above, these two requests were issued at exactly the same time (as its evident from the time mentioned in response --> see below), I am copying the requests and responses below, if anyone has encountered this issue or can shed some light on why it may be happening, please let us know. B/w we suspect this has been happening before as well as we encountered similar issues before but this was the first time we troubleshooted this in detail with fiddler traces.

Request 1

GET https://<hostname>/api/data/v8.2/contracttemplates?$select=contracttemplateid&$top=10&$filter=name%20eq%20'Service'HTTP/1.1

Accept: application/json

Authorization: Bearer <tokenGoesHere>

Host: <hostname>

Response 1

HTTP/1.1 200 OK

Cache-Control: no-cache

Pragma: no-cache

Content-Type: application/json; odata.metadata=minimal

Expires: -1

Server: Microsoft-IIS/8.5