No, I think there are some that look fine or perhaps the line is hidden by the axis?
But this was also not meant as a formal bug report - more as a shared laugh over a funny glitch.
This report has been created with v1.33 and I do not even know if there is anyone else for whom it looks that way. Maybe it is one plot type from that library, but I would definitively also check the data plotted before you treat that seriously