About missing config elements

How exactly the command "load override " works internally? Could it by any chance cause config elements to go missing? If not , what are the possible reasons the config elements can go missing ?

Can you be more specific in describing your use case?

Using load override command a configuration was loaded…and after which the config terminal did not show any leads for configuration…but when confd was restarted the problem was no longer there…
Note : the configuration values were preserved though no matter what happened to the missing leaves