Glissando incorrectly presented over line break
When there is a glissando that occurs across a line break, instead of behaving like a slur and splitting up nicely, it will be naughty and jump to the next line and extend to the infinities. This is only related to the display and does not corrupt the gilss, as it behaves again when the line break is adjusted so that the two measures are juxtaposed.
One idea that would temporarily solve this problem (and would be very useful otherwise) is an option in the "breaks and spacers" palette that binds two measures together, so either both of the measures must jump to the next line, or they both must stay on the same line. Maybe this would be easier? (It can't be good notation practice to put them on separate lines anyway.)