Modal scrolls down past overlay on mobile browsers/iOS simulator

[maxscott]

I might be doing something very dumb here, but it appears that using modals as routes causes some strange behavior on mobile.

Repo demonstrating issue using routes

Branch using the controller/param strategy

After opening a modal and clicking on an input, note that the page has scrolled down past the overlay.

Then, when clicking on the other input, the modal temporarily goes away and looks like it transitions from off screen, but no css transition or animation exists.

Really not sure why this would behave any different from the examples--curious if anyone has seen this or know what it could be.

[maxscott]

Updated description to reference a recreated example repo using:

ember-cli: 2.9.1
node: 6.3.1
os: darwin x64

Hoping to get some kind of feedback about this at some point.

[maxscott]

closing as a duplicate of #154