There is an annoying bug on quite a number of the VW std (Discover Media) units which causes either a) all your selected POI's, incl. the speed cameras to disappear or b) shows more POI's than you have selected - here is a quick fix for this;

Mk7 units - at the bottom of the map display, select view, then toggle display POI off, then back on and the cameras will come back.

Mk7.5 units - toggle the map display between the virtual dash and the main screen and the speed cameras will come back.