After updating to iOS 10, seems like all the iMessage app extension bricked. It doesnt go pass the Loading Screen which display the app logo in the center. It wont load the app content.
However, when running the app through xcode and attach the debugger on it, everything works as expected. Seems like the issue was caused when the app (with the iMessage extension) was installed before iOS 10 is installed.
It has been happening on the other app extensions as well. Any clues?