@fagnerc Last time I used crosswalk is when ionic 2 still in beta phase… after that I decide to limit building scope to kitkat or newer version only…
check App not working well in jelly bean?
From what I know, your browser can’t render the html correctly (i.e: you get ‘unresponsive’ element, etc)
If you have no primary reason to target older device, I suggest to limit your app to 4.4 or newer 
@alex_key if you install crosswalk, they should be used already when you build your app… you will get the ARM and/or x86 version of your apk (which should have larger file size in general)