we have Buttons to change the time scaling of the scheduler, which dynamically add/remove timeHeaders of scheduler. By doing this, the RowHeaderHideIcon does not update its position. So it occurs that the Icon is on the timeHeaders. When there`s only one data row, the icon is sometimes positioned below the scheduler.
To comprehend this issue, i`ve created this codepen: https://codepen.io/TORISO/pen/GRNYqWL?editors=1011
Press "Toggle Week-Header" to see it.