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<@UBLEQB51A> I don't know about `spinner`, but I was having similar issues with a `stringBinding` in a `label`: NPE thrown when loading the view (or fragment, in my case) on the property, yet the property seemingly containing a valid value. This was with simple object properties and custom enum types. For me, the fix was to use them in nullable expressions (`?.`), even though the final rendered item contained a non-null value. I'm not sure, but my guess is that properties are getting evaluated multiple times are this are rendered, and at the beginning those properties aren't bound/evaluated, but they become so later on in the rendering pipeline. Again, that's just my guess. I don't know squat about how TornadoFX works internally, so this could be all pulled from a dark anatomical hole on my part. :man-shrugging: