Line scale display priority

Hi Guys,

Here is a screenshot taken in Layout viewport, vector.

There are lines tagged A and B in Sketchup, and in Layout I changed their Line Scale under Tags window, so A is heavier and B is thinner, and when they are stack on each other, there will only be one line scale displayed. And in this case, lines tagged B is displayed, and I have tested, even I put lines B under A in Sketchup, the line scale B will still be displayed preferentially.

So my question is what is working logic of the line scale display priority when they stack on each other?

I have done more test, lines tagged A, B, C, D, and put them on different line scale in Layout.

Looks like B is dominating anyway, it has nothing to do with how heavier the line weight is, it will always dispaly line B’s line scale. And line C has the minimum priority.

So I really want to work out the logic under it, what is determining the display priorities?