My hosting is not siteground and the problem does not seem to be related to my hosting.
I added an exeption to the wordpress security plugin I am using, allowing Mollie to access the REST API. Now order payment updates seem to be working fine. Still I’d rather see the plugin fixed…
Different hosting here, but the same problems. I saw blocked webhook traffic from Mollie in an application layer firewall I am using to block access to the REST API. So it seems the new webhook implementation is suspicious to other security solutions too. Perhaps whitelisting might solve the problem, but we really shouldn’t have to.
