I observed so many times that app get stuck with splash screen and nothing happens in this case. We are getting below logs on Xcode console at that time.
2014-01-20 13:09:14.822 MyApp[4326:a0b] Resetting plugins due to page load.
2014-01-20 13:09:34.924 MyApp[4326:a0b] Failed to load webpage with error: The request timed out.
This is just a default application with index.html page and text Hello Worklight
in it.
This is tested on IOS6
and IOS7
simulator and device both.