This is super weird and annoying.
If you draft a face in perspective with ortho faces, then you can see the face through the body you're working on (which is great)

.. until you hit the ortho view (which is where you really need it) and then it disappears

If you stay in perspective only mode then it stays but you can't properly visualize the draft angle which is completely useless.
Please keep it visible in ortho mode.