It works for me but you can't really add a lot of blur. Just a bit. Not enough to make a smooth bokeh'ed image.
Yeah this seems like a glaring miss from adobe
Hi Marcie, did I get it right that when you add a radial selection, and then choose invert at the top menu to make a e.g. vignette and change the sharpeness to e.g.-100 that you are not seeing the blurryness when you zoom in. You should see the same max value as you can set in Lr Desktop. Hope this helps. Guido