Flipping the trim direction not working with "plane trim mesh" command

Hi there,
when using the PlnTrimMsh command and Toggling between False and True to flip the trim direction I am always getting the left side of my object (in red).

I can’t find a reason for that, I have checked the mesh with MeshRepair and it says it is a good mesh (it is a quadmesh created with Rhino 7 64bit Win10).

Filipe2020071601 - Flipping sides on plan trim mesh.gh (322.6 KB)