The right-click 'Copy' action is not available for a Child Custom Sub Object Tab grid in the Details Fly-out from the Master Object grid or from an Investment grid.
Steps to Reproduce:
Expected Results: The right-click 'Copy' action should show disabled for users without 'Copy' access rights or enabled for users with the access rights on the Child Custom Sub Object.
Actual Results: The 'Copy' action does not show up at all for a Child Custom Sub Object tab in the Details Fly-out.
Workaround: For a child sub object under the Master object, go into the Sub Object module to use the 'Copy' action on the grid.
Targeted Fix in Release 16.1.2