[Ionic v4] ion-split-pane disabled attribute not dynamic

[marcelgoya]

Bug Report

The disabled attribute does not work with dynamic vars in Angular.

Ionic Info
Run ionic info from a terminal/cmd prompt and paste the output below.

Ionic:

   ionic (Ionic CLI)          : 4.0.1 (/usr/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.0
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0, ios 4.5.4

System:

   NodeJS : v9.11.2 (/usr/bin/node)
   npm    : 6.2.0
   OS     : Linux 4.4

Environment:

   ANDROID_HOME : not set

Describe the Bug
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Steps to Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Related Code
<ion-split-pane #mySplitPane *ngIf="plt.is('core') || plt.is('tablet')" disabled="{{(uiState$ | async)?.appIsTabSplitFullScreen}}">

Expected Behavior
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Additional Context
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[ionitron-bot]

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