A few fixes for stores using Mollie:
- Webhook callbacks from Mollie now use the same API key your store is configured with, so successful payments mark orders as paid even on installs that only set the newer environment variable.
- Mollie payment IDs are stored against each order, matching how every other gateway records its reference for support lookups and refunds.
- The return URL after payment now lands the customer on the correct order success page.
If your Mollie webhooks were inconsistent before, no action needed — the next payment should flow through cleanly.