Pendant lights placed on sloped ceilings are not showing any light when lowered below the "attic" height

[jp26jp]

I have some pendants that are placed on a sloped ceiling. When I initially place them, they display some luminosity but when I adjust the height so that they are closer to the island that they are being placed over, they lose all luminosity. They seem to lose luminosity once they are lowered past the point of where the "attic" would be if there was an attic. I've tried placing them on the attic level and it didn't change anything. This happens with every pendant I've tested.