Recently I upgraded to Magento 2.2.2 and tried to create a test order on my site via admin.
All goes fine until selecting the payment method. I've enabled Purchase Order as a payment method, and prior to the 2.2.2 upgrade, this was selectable in the order screen.
The option label appears but the input box doesn't.
I checked the console for errors, and none are shown. So I looked for the input field itself and noticed that the fieldset element has a style applied - style="display: none" but it's not in the admin stylesheet, it's applied directly to the fieldset element.
This means I can't place the order, as the field is required... If I disable the "hidden" style in the console I can see the form error when trying to submit the order.
Can anyone advise how to fix this?