Got this limitation resolved. The start and end date picker components are passing values into a named query parameter. To prevent the query running each time this value changes (eg, user is scrolling through time selector with arrows), there’s a button that needs to be clicked to execute the query. I’ve got the button script resetting the view custom property back to 1
This really should be a property on the component. Something like “initial time”
At some point it just becomes easier to have a component for the date, and another one for the time.