so… looks like the ingame lighting is just my newbie-ness. Once you switch on production quality lighting I get dynamic shadows and static baked shadows fine. My dynamic shadows are horribly low quality - but i think thats a different issue to be looked into since its just that I haven’t found out how to tweak the shadow system to deal with a camera zooming in from far away.
So… there’s still a bug in preview but looks like everything is fine ingame.