This has been reported by a user, I have checked and what he says is true.
Set up category boxes.
At the top level where all main categories appear in boxes and subcategories are linked underneath inside the box if you click on a subcategory you jump to the subcategory and if you click elsewhere in the box you jump to the parent category.
This is expected behaviour
…if you right click on a subcategory and select “open link in a new tab” on the browser popup menu it works as expected with the original tab remaining in place and the subcategory opens in a new tab. So far, so good.
But if you use the Ctrl+Click or Cmd+Click as the standard browser shortcut for Right Click Open in a new tab something weird happens.
The subcategory correctly opens in a new tab, but the original tab jumps to the parent category.
I think what is happening here is that the box div has a JQuery action associated with
<div ... data-url="link to main category"> and the links to the subcategories are conventional
Right click is fully handled by the browser and works
Ctrl+Click is trapped by the browser to open link in a new tab but the basic left click is still passed to JQuery to handle.
A similar thing happens if you try it in a category box shown in a category.
Is this fixable?