Reproducible crash on iOS9 when input field in modal header

[pors]

On iOS is it recommended by Apple to place the input field for search in a modal in the header. This makes sense as it makes better use of the space, and also because the search box stays into view when scrolling through the results.

Starting with the latest version of meteorhunt I modified templates/modals/search/search.html as follows:

<template name="search">
  {{#ionModal customTemplate=true}}
  <div class="bar bar-header bar-stable">
    <label class="item-input-wrapper">
      {{> ionIcon icon="ios-search" class="placeholder-icon"}}
      <input type="text" placeholder="Search" value="{{searchQuery}}">
    </label>
    <button class="buttons button button-clear nav-branding" data-dismiss="modal"><i>Close</i></button>
  </div>
  <div class="content has-header overflow-scroll">
    <div class="group no-padding">
      {{#each products}}
      {{> _productItem product=this path="products.show"}}
      {{/each}}
    </div>
  </div>
  {{/ionModal}}
</template>

The web versions works as should, and the ios simulator as well.

On a real device (iPhone 6, iOS 9) accessing the search function (tap in input bar) makes the app crash (sometimes). This is a bit of the Xcode output:

2015-09-24 19:00:51.507 MeteorHunt[2860:1170596] This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes.  This will cause an exception in a future release.
.
.
.
2015-09-24 19:00:51.515 MeteorHunt[2860:1170596] *** Assertion failure in -[UIApplication _cachedSystemAnimationFenceCreatingIfNecessary:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3505.16/UIApplication.m:1697
2015-09-24 19:00:51.519 MeteorHunt[2860:1170596] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'accessing _cachedSystemAnimationFence requires the main thread'

Please let me know if and how I can help debug this further.

PS I'm a big fan of Meteoric, thanks for the awesome work!

[pors]

Workaround that seems to work (hack):

Add a class to the modal:

  {{#ionModal customTemplate=true class="search-box"}}

that adds some top margin:

.search-box {
    margin-top: 20px;
}

[pors]

Might be related to ionic-team/ionic-framework#4402