Id is not present when it is used with include filter

[Mohammed-Aadil]

There is only _source part of json if related model get fetched with include filter.

[pulkitsinghal]

Nice catch! Can you submit a PR with a failing test for this? Probably don't even have to write a new one, just an assertion in a existing one might suffice.

That way we can put that together with the patch when we release to prove that it is fixed!