Variables don't display for queries

**Intended outcome:**

Any variables executed in a query should show in the active queries inspector.

**Actual outcome:**

Variables are always empty for queries. Mutations are fine.

**How to reproduce the issue:**

### Network tab
```
{"operationName":"brandSettings","variables":{"id":123123},"query":"query brandSettings($id: Int!) {\n organization(id: $id) {\n id\n orgSettings {\n defaultLocale\n __typename\n }\n brandSettings {\n communityLogo\n footerContent1\n footerContent2\n footerContent3\n primaryColor\n secondaryColor\n localized {\n language\n communityLogo\n footerContent1\n footerContent2\n footerContent3\n __typename\n }\n __typename\n }\n __typename\n }\n}\n"}
```

### Apollo dev tools

### Issue
network request shows `variables":{"id":123123}` but Apollo has `root: {} 0 keys`

**Desktop**
- OS: macOS
- Browser: Chrome 90.0.4430.85
- Extension version: 3.0.4
- Apollo client v2

Reproduce the issue from the Network tab using the provided query and variables, then inspect the active queries inspector in Apollo dev tools. Compare the displayed variables for the query with the working mutation behavior; done means query variables such as id are shown instead of an empty object.

Written by the indexing model from the issue text.