Push Plugin issue in iPhone - API stops working

Our hybrid application on ionic framework invokes various JSON APIs which works perfect in iOS (9x, 8x, using xcode 7.1) until I introduce the latest Push Plugin. Below are the plugins that we are using:
As soon as I introduce phonegap push plugin (I followed this link to add this plugin: http://virteom.com/how-to-create-an-ipa-file-using-xcode), API invocation stops and I couldn’t find any relevant error logs also. Appreciate any suggestions.