Delta printer 2D and 3D views only show quarter of things
When using a Delta printer 0,0 is the middle of the print bed. It looks like in the 2D and 3D views you only show the info from positive X and Y co-ordinates, which means only quarter of the image is shown:
Object in Cura:
You have set x and y min to 0 and not minus radius so it clips the renderings at allowed area. See printer configuartion general tab.
You are right... it works just fine with the correct minimum values.