Advanced Tab > Watched inputs option not working for Get Query

I am using a multi select component.
The list of options is populated using a graphql query which I want to run only when user clicks on the drop down.
In order to achieve this I have marked the query as run when manually triggered but I am not able to select the desired input in watched inputs as per the below link to prevent query from running on page load.

Could you please help with the issue?