Hi,
V5
I wanted line tan from larger blue circle to TOP of smaller green target circle.

thus I chose Line Tan from curve as opposed to Line Tangent to 2 curves.

It sees the second circle and decides to display quad and one believes this and clicks. However on closer inspection it chose for a point beyond the top. its error then established with line drawn from circle centre to top.

Repeatable error. I drew two black circles and got a 2mm error again beyond top

Hi Steve - this looks like a bug to me - both Quad Osnap and Tangent marker light up at the same time:

To override the tangent snapping for the second point in Line > Tangent, turn off Tangent by clicking the Point option at the command line.

Hmmm- but I am not so sure this is a bug- it finds the tangent point nearest the quad, a legitimate snap. Use the Point option to turn of tangent snapping for the second point.

…but if I have chosen line tan from curve it is supposed to only do one tan snap, if I had chosen line tan 2 curves then the 2nd snap is expected and legitimate ?