I understand. As you said, this is a bug. And I was also able to reproduce the following steps.
1. Move the blue line to the lower side of one of the green lines, making the intersection of the green lines impassable.
2. Create the midpoint of the blue line and move this to the position of the intersection of the green lines.
3. Move the blue line so that it is in a straight line and delete the midpoint.
A member registered Jan 20, 2023
