App not appearing in iMessage extension drawer

This is perplexing me and I am not sure why this is happening. Only on 1 device, my app's extension does not seem to appear in the bottom drawer. This was not the case until the device was updated to iOS 11. Extension seems to appear and work as expected on other devices (including iOS 11).

Suddenly the problem seems to be with this one device. The main app seems to get installed and work fine, the problem is only with the iMessage Extension.

Any ideas what could I be missing here? From the screenshot my app is missing in red block.

Not sure what the root cause of this was. I simply deleted the app from phone, rebooted the phone, closed and relaunched XCode, and build and run again. It appears to have come back and functioning normal.