Ivar showed me his vap where several plot elements make a continuous display, but breaks in one plot element cause it to scan across gaps in its data, where there are other plotElements who would draw things on the next frame.
This needs to be demonstrated and corrected.
Bug of the week goes to Ivar. This demonstrates:
https://github.com/autoplot/dev/blob/master/bugs/sf/2788/demoBug2788.jy
This is fixed.