‘This page doesn’t seem to exist’ on Post Name Permalink setting

Hello there, I’m encountering problems with my permalink structure and WooCommerce.

I’ve set my permalink structure to ‘Post name’ and everything works up until the final step, when I place the test order. I expect to see an Order Confirmation page, but actually see the message ‘This page doesn’t seem to exist’. The URL looks like this:

mywebsite.com/order-received/order-received/4995/?page_id=33&key=wc_order_xYnweQwSfHEgI

However, if I set the permalink structure to ‘Plain’ then the order confirmation page works fine. The URL parameters are appended to the URL like this:

mywebsite.com?=page_id=33&order-received=4996&key=wc_order_YsfwWnVyFYLd

Any ideas why this might be? Should I just continue with ‘Plain’ permalinks?