Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

Environment:
OS: macOS HighSierra
Node: 9.3.0
Yarn: 1.3.2
npm: 5.7.0
Watchman: 4.9.0

Packages: (wanted => installed)
"react-native": "^0.47.2",
"react": "^16.0.0-alpha.12",
"react-native-vector-icons": "^4.4.2",

Target Platform: Android (10.3)

Steps to Reproduce

im install APK from ./gradlew assembleRelease and running the app

(Write your steps here:)

1. upload costum font Rubik with react native vector icons
2. set all text with Rubik Font Family
3. generate APK with ./gradlew assembleRelease
4. test to see font in some devices

Expected Behavior

All text in this app, not overwrite with costum device phone

(Write what you thought would happen.)

Actual Behavior

when im define font family for all text with Rubik font.
in some device (SAMSUNG & OPPO) because that brand can choose costum font for their device.

But i dont know why, sometimes some text looks like overwrite with costum device font & some text still use Rubik font

Thanks