Display Styles hatch not showing, but solid fill does

I am using OBD Connect 

I am trying to pattern a slab in a plan DV. I can set a display rule to achieve a solid fill and other overrides but when I try to set a pattern or even a hatch / crosshatch they will not display anywhere, model, drawing view, sheet.

I have toggled Pattern in the View Attributes on and off, I have switched between visible edges / filled visible edges / shaded and checked the rule logic. No effect.

The rule is ELEMENT IS Slab > Hatch Area...