`sort` enum arg is being passed in as empty object

I'm trying to use the `sort` arg on a `findMany` query but it's not working as expected:

GraphQL query:
```
noteMany(sort: $sort) {
_id
}
```
Variables:
```
{
"sort": "_ID_DESC",
}
```

Upon inspection in the `wrapResolve` function and console logging `rp`, I'm seeing that the `sort` arg is coming in as an empty object:
```
{
source: undefined,
args: { limit: 100, sort: String {} },
...
```

Anyone have any idea on how to fix this?