ion-segment doesn't refresh for hiding div <div *ngIf="isActive"> #1536

Short description of the problem:

In .html I have a segment

<ion-segment small [(ngModel)]="isActive" (ionChange)="loadActive($event)">
       <ion-segment-button small value=true>
           <ion-label>Active</ion-label>
       </ion-segment-button>
       <ion-segment-button small value=false>
           <ion-label>Inactive</ion-label>
       </ion-segment-button>
   </ion-segment>

and simple code to show or hide just to test.

   {{isActive}}
    <div *ngIf='!isActive'>
        hello not active
    </div>

    <div *ngIf='isActive'>
        hello yes
    </div>

result is:

for tab active:

true
hello yes

for tab inactive:

false
hello yes

What behavior are you expecting?

for tab inactive should be :

false
hello not active

ionic info

Ionic:

Ionic CLI : 5.2.6 (/Users/mirg/.nvm/versions/node/v10.14.2/lib/node_modules/ionic)
Ionic Framework : @ionic/angular 4.6.2
@angular-devkit/build-angular : 0.13.9
@angular-devkit/schematics : 7.3.9
@angular/cli : 7.3.9
@ionic/angular-toolkit : 1.5.1

Cordova:

Cordova CLI : 8.1.2 (cordova-lib@8.1.1)
Cordova Platforms : browser 5.0.4
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.1.1, (and 12 other plugins)

Utility:

cordova-res : not installed
native-run : 0.2.2 (update available: 0.2.8)

System:

NodeJS : v10.14.2 (/Users/mirg/.nvm/versions/node/v10.14.2/bin/node)
npm : 6.10.2
OS : macOS Mojave
Xcode : Xcode 10.3 Build version 10G8