What plugins do you have installed?
You can only download one architecture, so if you've got a plugin installed that's generating two, the results may well be undefined. Crosswalk does this, which means you often need to use a slightly different Crosswalk plugin to get specific architecture builds.
Like i said, before signing app it was generating ARM apk, but when i sign it i only get x86 apk for some reason.
This is config.xml file of my app, so you can see what plugins i used here:
You're using Crosswalk, which generates two APKs for arm and x86. As such, the result is undefined as to which APK you'll get to download.
Instead, force the issue using a variation of the plugin that targets only one architecture, as seen in this plugin list: Plugin Search - Apache Cordova
To get an ARM APK, I'd use the cordova-plugin-crosswalk-webview-pgb-adapt-arm plugin.
Thanks! It worked!