I've used slider questions with custom start positions many times in the past, but for some reason I am unable to set a custom start position in the survey I'm currently creating. When I click on the "custom start position" button, which usually makes the slider handles visible so that they can be dragged to the desired starting position, nothing happens. I tried going back to old surveys in which I implemented this feature successfully, but even in those the slider handles are missing (in the editor). When I preview the old surveys, the custom start positions are there, but they are impossible for me to see or change in the editor.
Has anyone experienced this issue recently? Do you know of a way I can fix this?