bug: ion-segment initial state failed when using NgModel with Angular

Bug Report

**Ionic version: [x] 5.x

Current behavior:

1. We are using ion-segment in modal with Angular. For connivence, we use NgModel for two-way binding the checked value of ion-segment.

2. When showing the modal for the first time, the ion-segment-button is checked when its value matches the bound variable.

3. After closing the modal, enter again. The ion-segment-button is not checked even if its value matches the bound variable, leaving all buttons unchecked.

Expected behavior: button is checked when its value equals the bound variable.

Steps to reproduce:

1. download code from the following link
2. npm i
3. ionic s

Related code: https://github.com/tuif/ionic5-segment

Ionic info:

Ionic:

   Ionic CLI                     : 6.1.0 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.0.0
   @angular-devkit/build-angular : 0.803.25
   @angular-devkit/schematics    : 8.3.25
   @angular/cli                  : 8.3.25
   @ionic/angular-toolkit        : 2.1.2

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.1.0, ios 5.1.1
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.1.3, (and 21 other plugins)

Utility:

   cordova-res : not installed
   native-run  : 0.3.0

System:

   ios-sim : 8.0.2
   NodeJS  : v12.13.0 (/usr/local/bin/node)
   npm     : 6.13.7
   OS      : macOS Mojave
   Xcode   : Xcode 11.3.1 Build version 11C504

[dotocean]

We don’t comment on the timeline of releases, but we do hope to have 5.0.1 out soon.

Ok I’m sorry, Thanks for the fix!

[ionitron-bot[bot]]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.