Return controller does not load payments when building a custom plugin using Commerce Mollie

Problem/Motivation

When using a custom payment plugin based on Commerce Mollie the latest orders are not retrieved

Steps to reproduce

Create a custom payment gateway plugin using Commerce Mollie. The custom id will not retrieve the payments from the current order since $payment->getPaymentGateway()->getPluginId() === 'mollie'; only retrieves orders using the id 'mollie'.

Proposed resolution

Retrieve orders from the current payment using Mollie even when a custom plugin is used.