pollInterval causes query to be fired 10+ times every iteration

[MattGson]

Describe the bug
When using the pollInterval query option, the query is refetched on a fixed interval i.e. every 10 seconds.
Instead of making a single network request each iteration, many requests are fired simultaneously. Sometimes more than 10 at once for a single query.

To Reproduce

Create a query with a pollInterval i.e. 10 seconds

@override
Widget build(BuildContext context) {
     Query(
         options: QueryOptions(
         documentNode: MyQuery.document,
         pollInterval: 10,
          variables: {
            'id': 5,
          },
        ),
        builder: (QueryResult result, {fetchMore, refetch}) {
             return SizedBox();
        } 
    );
}

Expected behavior
The query will be refetched from the network every 10 seconds.

Screenshots
Below is my server logs showing the query being fired many times on a single poll (notice timestamp is exactly the same).

[MattGson]

Seems to be resolved in 3.1.0. Possibly related to (#533)