Criteria::fromInput fails with multiselect boxes

So here is the issue. I have a mutliselect called "systemStatus". if Criteria::fromInput() detects an array it should convert from an "=" in the PDO conversion to a IN ().

This code

$query = Criteria::fromInput($this->di,'Nova\Models\Accounts', $this->request->getPost());
$params = $query->getParams()

Generates this

Array
(
    [conditions] => [systemStatus] = :systemStatus: AND [deleted] = :deleted:
    [bind] => Array
        (
            [systemStatus] => Array
                (
                    [0] => 5001
                    [1] => 5002
                )

            [deleted] => 0
        )

)

which is throwing an error because "=" is expecting a string not an array;

PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens