CONTROL-SHIFT-click to deselect doesn't work unless you can click the parent (parent must be visible)

In IGB, if you select multiple items and then CONTROL-SHIFT-CLICK one of the selected items, the item you clicked is supposed to be de-selected and the other items currently selected remain selected.
However, this feature appears to be broken. Now, if you want to deselect an item, you have to click on its parent, which is possible only if the item's parent glyph is visible.
In other words, if the item is a single span feature (covering the "parent") then it is impossible to de-select it w/o also deselecting everything else.
In IGB 6.7, it was possible to deselect any item using SHIFT-CONTROL-click. Can we revert back to the IGB 6.7 behavior?

I propose that:
If user clicks an item while pressing SHIFT-CONTROL, the item and its parent should be deselected. If the item is not currently selected, nothing should happen.