Infinite lines are seldom drawing correctly for me. I have not completely bounded the problem, but one consistent bug is when the coordinate system origin is outside of the drawing window, and I lay down an infinite line, it is displayed offset by a considerable amount.
I found by trail and error that the line itself is in the correct position, because when I rope a selection box that includes the line, it gets selected and highlights blue. The problem is how it is drawn.
Further, when I zoom in or out, the line jumps around to different offsets, and usually only part of the line shows up, which of course violates the concept of being infinite.
If I zoomfit the entire drawing, then lay down the line, it does so properly. I can even pan the drawing then and the line is correct. However, as soon as I pan and zoom into the area of interest, the line is misdrawn. My drawing is too big to always work with the origin in the drawing window. Help welcome.
Version string is: "DraftSight 2020 x64 SP1".
