Disappearing Intersection point

[dickinson0718]

Follow these steps:

1. Create a line segment, Ls1, from P1 to P2
2. Create a circle, C1, with center P1 and circle point P2
3. Create a line,Li1, from P1 to P2
4. Create a point, P3 (but named P5 internally) at the intersection of the line and the circle (not at P2)
5. Move P1, then the point P3/P5 at the intersection created in step 5 disappears.

I have traced this to the SEIntersectionPoint not updating correctly. The principle parents are Ls1 and 'C1andLi1` gets added as other parent but the update doesn't seem to work.