Bug or user error? Face vertex indices in the wrong order when a mesh is not triangulated

[ChristophePlourde]

Hello!
I noticed an issue when exporting a mesh with maya usd. But, it may also very well be a user error or a setting I am missing somewhere, so I wanted to ask here first before logging an issue.
So, in maya, I created a cube and moved two vertices. It gave me this:

Then, I put it in a group to be able to export to Usd. When I open it in usd view, I have this:

In the usd file, I have this:

If I changed them manually to this:

Then I have the same display in usd view and in Maya:

Then, if I go back to maya, I select my mesh, and I triangulate it:

Now I have the same in usd view (no need to manually edit the usda file):

Which means the face vertex indices for triangles seem to match between maya and usd-view

So, I wonder, is it:
a) An inconsistency between maya-usd and usd-view to decide which vertex is index 3 for example?
b) A setting in maya that I need to change?
c) "Normal" to have undefined behavior if I don't triangulate in this situation? If so, why?

Thank you in advance and if anything is not clear please let me know and I'd happily clarify/elaborate!

P.S.: I am using maya 2022.4 with maya-usd 0.20.0, in case it is relevant!