I also had problems with vector rendering or hybridization in lines of an architectural plant as discussed in this topic
https://forums.sketchup.com/t/lo-2018-line-drop-out-in-vector-or-hybrid/55745
I also had problems with vector rendering or hybridization in lines of an architectural plant as discussed in this topic
https://forums.sketchup.com/t/lo-2018-line-drop-out-in-vector-or-hybrid/55745