My Order Attribute relations don't work, how can I check if everything is configured correctly?

My Order Attribute relations don't work, how can I check if everything is configured correctly?

Firstly, check which attribute is used as a parent attribute in the relation. The Order Attributes relations could be created only for parent attributes with the following types: Dropdown, Radio Button, Checkbox Group. 

Secondly, please, make sure the attributes in question are set within the same Checkout Step: