create-react-native-app: Expo stuck on loading my app

Description

After scanning the qrcode, Expo stuck on loading my app.

Expected Behavior

Expo should load my app.

Observed Behavior

Expo stuck in showing it’s loading icon, as shown below. Attention, the icon blinks all the time.

1. At the beginning, the problem does not exist. But later it comes, and I don’t know why.
2. The phone and mac is in the same network, and the phone can visit the address : http://myId:19000, which is shown on the terminal. The phone also can visit the JS bundle File, such as : http://myIp:19001/node_modules/react-native-scripts/build/bin/crna-entry.bundle?platform=ios&dev=true&strict=false&minify=false&hot=false&assetPlugin=expo/tools/hashAssetFiles
3. I have tried reinstall the Expo APP and restart the npm start, it doesn’t work.

Environment

• npm ls react-native-scripts: @0.0.31
• npm ls react-native: @0.44.3
• npm ls expo: @17.0.0
• node -v: v7.7.4
• npm -v: v4.1.2
• yarn --version: 0.20.3
• watchman version: command not found

Also specify:

1. Operating system: macOS Sierra 10.12.1
2. Phone/emulator/simulator & version: Redmi Note 2, Android 5.0.2LRX22G

Reproducible Demo

The demo is here : https://github.com/youngwind/react-native-demo Any suggestion may help, thanks!