Hey, As per your deviceToken is same for both the plugins, so you will get Push in both Services, you have defined in Manifest file.
So error occurs while parsing message in one of GCMService as message is not in proper format as expected by that Service.
You can resolve it by making some prior checks on GCMService of both plugins.
You can send message from AppHQ in Json format that contains a TAG like : App42
In onMessage method of both the GCMServices, filter message by Tag, and perform desired operations accordingly.
Let me know if further further query is concern.