OnMouseOver events inside a triggerbox

I am trying to use OnMouseOver on 2 trigger boxes, one is inside the other.
The problem i am having is that my cursor does not detect both “collisions” of the trigger boxes, only the most outer one.

To counteract this i have set up a slightly more complicated version, where there are 4 trigger boxes surrounding the other one and i trigger a variable for whenever i’m inside on a flip flop.

So my main question is, how can i have my cursor detect both trigger boxes that are overlapping.
I tried changing collision types, but at the moment it only appears to work when the trigger box collisions are set to Block All.

Any help would be highly appreciated.