Whether in ortho mode or not, I see the same problem in version 29 (2020). Also in prior 3 versions. Huge delay between renderings of cursor crosshair.
I thought it might be the multiple redraw problem described by Dr PR. When I set the view setting to "wireframe all views", the problem changed to one of failure to recognize the grab handle.
So I drew a short vector from one of the points I wanted to move. Then I selected all, and point selected the points I wanted to move plus the new line. I grabbed the point on the free end of the new line. The move worked whether in point ortho mode or not.
Works fine if one is using point relative to set the destination.
Or one could first copy the new line to the point destination, Then pointmove endpoint to endpoint. Then erase the last two lines.
Hmm,,, If IMSI never comes back to the forum, seems as though a macro might be able to perform this function.....