To reproduce:

• Create a ReorderableList control (you can use the Timeline)
• Add two or more items
• use a Left mouse click to select an item
• use a Right mouse click to attempt to select another

Expected: the right mouse click will cause the second item to be selected
Actual: first item remains selected. In many uses of ReorderableList we are popping up context menus based on the item that is being right clicked on, this causes the menu to appear over the 'new' item, but operate on the 'old' item (the one that is still selected).