Scrolling works well on 4.2 and has lags on 4.4

1

I released my app and users are complaining that scrolling is very laggy.
I have only device with android 4.2 - can’t test on real device with 4.4.
So I can test on genymotion and I can confirm that scrolling (collection-repeat (height is set) with infinite-scroll) on 4.4 works worse than on 4.2

Is it known bug? Can anyone test it on 4.4? https://play.google.com/store/apps/details?id=pl.polskieszlaki.PolskieSzlaki - if You can tap “Atrakcje”

Edit: on genymotion android 5.0 it works even worse :expressionless:

Edit2
I’m testing now from fresh start using Your starter template:

  1. ionic start test_app
  2. ionic platform add android
  3. change tab-dash.html 
<ion-view view-title="Dashboard">
  <ion-content scroll="true" class="padding">
    <ion-list>
      <ion-item collection-repeat="item in items">
        {{item}}
      </ion-item>
    </ion-list>
  </ion-content>
</ion-view>
  1. change controllers.js 
.controller('DashCtrl', function ($scope) {
        $scope.items = [];
        for (var i = 0; i < 1000; i++) $scope.items.push(i);
    })
  1. start genymotion android 4.4.4 (Nexus 4) - very, very laggy
  2. start genymotion android 4.2.2 - works fine.
  3. Here is mine ionic info 
OS: Windows 8.1
Node Version: v0.12.2
Cordova CLI: 4.3.0
Ionic Version: 1.0.0-rc.4
Ionic CLI Version: 1.3.19
2

Anyone, please? As I said I cant test on real device