AMP page https://cdn.relaymedia.com/amp/www.civilbeat.org/2016/11/chang-raises-spends-3-times-more-than-slom-in-senate-race/

Should look like this when amp-sidebar is open

However in the Google search results viewer it looks like this

With the header bar on top of the amp-sidebar - the offending code seems to be element level css on the header and only happens on iPhone (Chrome and Safari including emulation)

element.style {
    pointer-events: initial;
    z-index: 10999;
    top: calc(54px);
}