Incompatability with Mollie Payment gateway

Hi guys,
I’m noticing ( complaints from customers) that when customers select a certain payment methodon the checkout page (Ideal), and select continue for payment, they immediatly get the thank you page, without a payment being processed. I have noticed getting multiple 0 euro sales. With these sales, the customer info is not complete, but i can see what they tried to order. When disabling the plugin, this error disappears. Any ideas how to solve this. Please let me know if you need more details.

Greetings,
Erick