I have had good success by hotkeying a shortcut for x-ray mode.

Move the curser to where you wish to inference and hit the hotkey.

You can still see where the line intersects the plane.

So far, the inference engine picks this point out and gives the intersection snap (little red X) pretty much every time.

Kind of lame it takes switching x-ray on and off, but, at least it is an acknowledged bug and well get addressed soon.

Cheers, Chuck