Sencha touch charts 2.0 beta : Blurring labels in IPhone device - extjs

We have developed an application in Sencha touch 2.1 .
We need to display our records in Column chart, so we used Sencha touch charts 2.0 beta .
It works well in Chrome, Safari browsers and android emulator.
But in Iphone device the chart seems blurred . We cannot even read the labels in charts.

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I have a Codename One app which orientation is locked to portrait. That app is build to Android and iOS. It's a social and the portrait orientation is fine, except for video and images when they are landscape oriented.
To see a full screen image in a landscape orientation, I workarounded the problem rotating the image before showing it. However I suppose that the same workaround is not applicable to play a video.
How can I programmatically change the orientation of a Form to landscape when the app is locked to portrait? Otherwise, how can I satisfy the use case that I described? Thank you
This only works on Android and doesn't work for our iOS port. Notice that if you use the setNativePlayerMode it will work for iOS as well but you won't have any control as described here: https://stackoverflow.com/a/59495797/756809
You can set orientation to landscape explicitly using CN.lockOrientation(false). You can release the lock using CN.unlockOrientation().
But this will only work on Android and won't really impact iOS.

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It work fine in everything except mobile Safari on iOS 7. On an iPad running iOS 7 the side map works - ie: you can pan and zoom, but the other map is as if it's an image - no panning, zooming, or clicking to add a marker.
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Debugging does show that they don't ever fire the click event to add markers.
The iPad on iOS6 is fine. Android is fine. Desktop browsers are fine.
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Is iOS7 mobile Safari the new IE? I've had quite a few issues now that only crop up on iOS7.
Update:
The Doctor was right. Here's the code to fix it:
$timeout(function(){
_.each(document.getElementsByClassName("gm-style"), function(e){
this.addEventListener('touchstart', function(event){});
});
}, 3000);
I get the sense that iOS7 Safari is a bit buggy when it comes to touch events.
I found this thread which talks about a specific touch event but I think other events have similar issues. `-webkit-overflow-scrolling: touch` broken for initially offscreen elements in iOS7

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