Hi John,
I suspect you're declaring the dialog inside an element that creates its 
own stacking context, and since you see the issue on ios only, I bet your 
dialog is inside an element that sets -webkit-overflow-scrolling: touch 
https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-overflow-scrolling 
(which creates a new stacking context)
This is a known limitation of overlays (see doc 
https://elements.polymer-project.org/elements/iron-overlay-behavior), and 
until we come with a better solution (or the platform provides a way to 
overcome these stacking context issues), the suggestion is to add overlays 
to body wherever possible, or to take care of the stacking context.

Hope this helps,
Valdrin

On Tuesday, February 16, 2016 at 1:34:09 AM UTC+11, John Brosan wrote:
>
> Hello everyone,
>
> I am working on a component, and need to invoke a paper-dialog from this 
> custom element. The paper-dialog seems to work on on regular PC/Mac 
> Chrome/Safari. However, when I test on iOS9 (iPhone 6s) the dialog seems to 
> appear "under" the header of the Polymer Starter Kit. Again, this does not 
> happen on Chrome/Safari for PC/Mac. Does anyone have suggestions, or links 
> on how to resolve this?
>
> Thanks,
> John
>

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