Thank you very much for taking the time.
I loaded the original plan from your link above and - believe it or not - it shows the same corrupt vertical lines. At this point I am pretty much lost. Either it’s some settings in my sim or some faulty data… I’ll try to investigate, notably, if more plans are affected. Several other plans I used so far or created myself display fine.
I wouldn’t care too much about RosiG2’s approach. She actually took the original plan, made a Bush Trip with a (not too exciting) narrative of it, added another plan for the North of Japan and sold it. I may be wrong, but a flightplan as such probably isn’t considered copyrighted material.