Uglify Doesn't seem to work

When I ran tns run ios --release --env.uglify or tns build android --release --env.uglify it doesn't seem to Uglify the code at all, I can see the source code and it's readable. Am I doing this wrong somehow?

My app is written with NativeScript core and TypeScript.
My environment:

$ tns doctor
✔ Getting environment information 

No issues were detected.
✔ Your ANDROID_HOME environment variable is set and points to correct directory.
✔ Your adb from the Android SDK is correctly installed.
✔ The Android SDK is installed.
✔ A compatible Android SDK for compilation is found.
✔ Javac is installed and is configured properly.
✔ The Java Development Kit (JDK) is installed and is configured properly.
✔ Xcode is installed and is configured properly.
✔ xcodeproj is installed and is configured properly.
✔ CocoaPods are installed.
✔ CocoaPods update is not required.
✔ CocoaPods are configured properly.
✔ Your current CocoaPods version is newer than 1.0.0.
✔ Python installed and configured correctly.
✔ The Python 'six' package is found.
✔ Xcode version 10.2.1 satisfies minimum required version 9.
✔ Getting NativeScript components versions information...
⚠ Update available for component nativescript. Your current version is 5.4.0 and the latest available version is 5.4.2.
✔ Component tns-core-modules has 5.4.3 version and is up to date.
✔ Component tns-android has 5.4.0 version and is up to date.
✔ Component tns-ios has 5.4.2 version and is up to date.

tns plugin
Dependencies:
┌────────────────────────────────┬─────────┐
│ Plugin                         │ Version │
│ @types/base-64                 │ ^0.1.3  │
│ @types/utf8                    │ ^2.1.6  │
│ base-64                        │ ^0.1.0  │
│ nativescript-camera            │ ^4.4.0  │
│ nativescript-checkbox          │ ^3.0.3  │
│ nativescript-clipboard         │ ^1.1.7  │
│ nativescript-fingerprint-auth  │ ^6.2.0  │
│ nativescript-https             │ ^1.0.3  │
│ nativescript-image-zoom        │ ^3.0.3  │
│ nativescript-mapbox            │ ^4.4.1  │
│ nativescript-masked-text-field │ ^4.0.1  │
│ nativescript-menu              │ ^1.0.3  │
│ nativescript-orientation       │ ^2.2.1  │
│ nativescript-pdf-view          │ ^2.0.1  │
│ nativescript-platform-css      │ ^1.6.7  │
│ nativescript-secure-storage    │ ^2.4.0  │
│ nativescript-social-share      │ ^1.5.1  │
│ nativescript-stripe            │ ^5.0.8  │
│ nativescript-toasty            │ ^1.3.0  │
│ nativescript-ui-listview       │ ^6.1.0  │
│ nativescript-ui-sidedrawer     │ ^6.0.0  │
│ nativescript-videoplayer       │ ^4.2.1  │
│ nativescript-wonderpush        │ ^0.1.1  │
│ rxjs                           │ ~6.3.0  │
│ tns-core-modules               │ ^5.4.0  │
│ utf8                           │ ^3.0.0  │
└────────────────────────────────┴─────────┘
Dev Dependencies:
┌─────────────────────────────┬─────────┐
│ Plugin                      │ Version │
│ nativescript-dev-sass       │ ^1.7.0  │
│ nativescript-dev-typescript │ ~0.7.0  │
│ nativescript-dev-webpack    │ ^0.22.0 │
│ nativescript-theme-core     │ ^1.0.4  │
│ node-sass                   │ ^4.11.0 │
│ tns-platform-declarations   │ ^5.2.0  │
│ tslint                      │ ~5.11.0 │
└─────────────────────────────┴─────────┘

Bắt đầu bằng cách tái hiện sự cố với các lệnh được báo cáo tns run ios --release --env.uglify và tns build android --release --env.uglify, sử dụng các phiên bản NativeScript và plugin được liệt kê. Theo dõi điểm vào của quá trình uglification của release build và so sánh đầu ra được tạo trên cả hai nền tảng; được coi là hoàn tất khi đầu ra release không còn dễ đọc và hành vi đã được xác minh cho thiết lập được báo cáo.