Tappable area (hotspot) bigger than initial "Plus" button

[SantiPerti]

Hi all, I inherited an Objective-C project which uses LGPlusButtons.
It behaves like this: there is a main button which, once tapped, reveals two sub-buttons, so user can choose between a couple of actions.

But there is one problem: The whole hotspot area is active, even where the sub-buttons will be, but before main button is tapped and these sub-buttons are visible, which makes a much bigger tappable area when that area should still be not active, leading to unwanted behavior.

I have read docs and class ref. and I can't find a property to be able to set or a way to control that behavior.

Thanks a lot for any help.