Cannot view CHANGED_AT although it is added into view configuration

Hello Everyone,

I have added "CHANGED_AT" attribute into the view configuration of Sales Order Search Results. However, some of the users cannot view the the column in sales order search results in QA system. It is interesting that the same users are able to view the column in development system. The same issue applies for the "System status" attribute, too. I have checked whether the transport request was transferred or not, and I have seen that it is successfully transferred.

Thank you in advance, for your kind attention.