Does the app freezes at the time of opening or does it not even open?
It doesn't freeze at all and doesn't fail at opening; it's a runtime error where half of the app seems to load.
Specifically, the app is cut into two distinct parts; tabs, which hold objects, and the objects themselves in the tab containers. The tabs and the containers will always load fine, but the objects which are to be housed within those tab containers sometimes fail to load.
Are you using app_type: rhoelements in build.yml?
Can you also send log:
To see all the device messages, run adb -d logcat and start the application on your device.