Multi-Snap tentative does not snap correctly during the copy command? Will work on the third try.

I typically use mulita snap mode with keypoint and intersection checked off.   It seams to work fine when I snap  using the place line command.  But when select a bunch of elements and want to copy them & snap to the end of a line using the tentative mouse wheel button, it does not automatically snap to the end of the line.   It requires about three clicks until it picks the end of the line.  I only have issues during the copy command.  With all other commands the multi-snap tentative works fine.