Hello,
In the order product i have enabled the editable grid from the order form (since the grid is in the order) and added the custom fields that I created in the active view of the grid, quick create form including the main form that should be modified in-line within the grid.
The fields do not have:
-Any Field level security profile enabled and I am already a system administrator.
-The fields are not from a related entity in the view since they were created under the order product entity of type (Dates & 1 lookup) very straightforward.
After I published and tried to do modifications within the editable grid it shows the custom fields that I created as locked and the strange thing is that the Quantity is open and I can edit it.

I am still wondering why I am not able to do changes to those custom fields since I do not even have any special customization on the sub-grid that locks fields.
Can anyone advise what might be the issue?
Any help is greatly appreciated.
Best regards,
EBMRay