Re: to ssmith_c: I'm using it in another view and I get the same behavior there, but right now I'm running that other view in the Preview Pane. I wonder if this is a bug specific to Preview. I'll give it a try in an iPhone simulator when I get done with work today. If it works, I'll let ya know. And many thanks for the response, and the pointer. I'm just starting out with learning SwiftUI, but I've got decades of experience as a Software Engineer, so I very much like to dig through working examples to learn when I can, instead of bugging folks with questions. :-)