Slider issue

The slider below which showcases timer for various flights doesn’t move towards extreme left or right when there are lots of flights in the flight handling stands. This issue is in Nagoya airport. Please fix this issue. I lost 5 flights money because I could not complete the task in time. The reason, I was stuck in the slider, it did not go the way I wanted it to go for selecting an upcoming plane on flight handling stand. Thank you.