First of all, I'm sorry if this is an absurd or stupid doubt, after all I did not go to college in the area, just being a curious person willing to learn.
A few days ago I started to read about the Sweep-Line algorithm, and I even managed to implement it. However, I did find some problems that could arise, such as the figure below, sharing the same Event .
I have visited several foreign articles on the subject, but I have not found any answers.
I would like to know if this is really a problem and (if so) how to bypass it.
Maybe the image will be more efficient: 