EpiCombo - "SetInitialValue" method returns extra columns

Created an EpiCombo control to display the plantID. That worked fine.

After that, I called the “SetInitialValue” method to set the initial value to the current plantID. It works as expected however it returns extra columns.

Calling “SetColumnFilter” to set the list of columns helped. However, it works only after the second click.

Is there another way to tell the “SetInitialValue” method to filter the dropdown result?