[4.0.0-beta.5] virtual-scroll no render

[Anthony2539]

Bug Report

Ionic Info

Ionic:
   ionic (Ionic CLI)          : 4.1.1 (/usr/local/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.5
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.1.0
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

Cordova:

   cordova (Cordova CLI) : 7.1.0
   Cordova Platforms     : browser 5.0.4, ios 4.5.5
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.2, (and 7 other plugins)

System:

   ios-deploy : 1.9.2
   ios-sim    : 6.1.1
   NodeJS     : v10.6.0 (/usr/local/bin/node)
   npm        : 6.4.0
   OS         : macOS High Sierra
   Xcode      : Xcode 9.4.1 Build version 9F2000

Describe the Bug
I have just update ionic core version to 4.0.0-beta.5 and my virtual-scroll doesn't render anything.
this is my page html:

<ion-content>
    <my-loader *ngIf="loading"></my-loader>
    <ion-virtual-scroll *ngIf="!loading" [items]="stations" approxItemHeight="45px">
        <ion-item button *virtualItem="let station" (click)="itemSelected(station)">
            {{station.name}}
        </ion-item>
    </ion-virtual-scroll>
</ion-content>

Additional Context
this is my package.json

"dependencies": {
    "@angular/common": "6.1.0",
    "@angular/core": "6.1.0",
    "@angular/forms": "6.1.0",
    "@angular/http": "6.1.0",
    "@angular/platform-browser": "6.1.0",
    "@angular/platform-browser-dynamic": "6.1.0",
    "@angular/router": "6.1.0",
    "@ionic-native/core": "5.0.0-beta.14",
    "@ionic-native/geolocation": "5.0.0-beta.14",
    "@ionic-native/globalization": "5.0.0-beta.14",
    "@ionic-native/google-maps": "^5.0.0-beta.20",
    "@ionic-native/splash-screen": "5.0.0-beta.14",
    "@ionic-native/status-bar": "5.0.0-beta.14",
    "@ionic/angular": "4.0.0-beta.5",
    "@ionic/ng-toolkit": "1.0.0",
    "@ionic/pro": "2.0.3",
    "@ionic/schematics-angular": "1.0.1",
    "@ngx-translate/core": "^10.0.2",
    "@ngx-translate/http-loader": "^3.0.1",
    "angularfire2": "^5.0.0-rc.11",
    "cordova-browser": "5.0.4",
    "cordova-ios": "4.5.5",
    "cordova-plugin-device": "^2.0.2",
    "cordova-plugin-geolocation": "^4.0.1",
    "cordova-plugin-globalization": "^1.11.0",
    "cordova-plugin-googlemaps": "^2.4.1",
    "cordova-plugin-ionic-keyboard": "^2.1.2",
    "cordova-plugin-ionic-webview": "^2.0.2",
    "cordova-plugin-splashscreen": "^5.0.2",
    "cordova-plugin-whitelist": "^1.3.3",
    "core-js": "^2.5.3",
    "firebase": "^5.3.0",
    "ionic-plugin-keyboard": "^2.2.1",
    "lodash": "^4.17.10",
    "moment": "^2.22.2",
    "rxjs": "6.2.2",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular/cli": "6.1.0",
    "@angular/compiler": "6.1.0",
    "@angular/compiler-cli": "6.1.0",
    "@angular/language-service": "6.1.0",
    "@angular-devkit/architect": "0.7.0-rc.3",
    "@angular-devkit/build-angular": "0.7.0-rc.3",
    "@angular-devkit/core": "0.7.0-rc.3",
    "@angular-devkit/schematics": "0.7.0-rc.3",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~10.5.2",
    "codelyzer": "~4.4.2",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.2",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~2.9.2"
  },
  "description": "An Ionic project",
  "cordova": {
    "plugins": {
      "cordova-plugin-whitelist": {},
      "cordova-plugin-device": {},
      "cordova-plugin-splashscreen": {},
      "cordova-plugin-ionic-webview": {},
      "cordova-plugin-ionic-keyboard": {},
      "cordova-plugin-globalization": {},
      "ionic-plugin-keyboard": {},
      "cordova-plugin-geolocation": {
        "GEOLOCATION_USAGE_DESCRIPTION": "To locate you"
      },
    },
    "platforms": [
      "ios",
      "browser"
    ]
  }

[GordoRank]

I have the same issue and have had to revert to beta.3 for the time being. Of course this suffers from other issues that beta.5 fixes, like the scroller not updating when it's data changes etc.

I think it would be useful to make some of the basic methods to update or recalculate the scroller public, so that we can force these updates ourselves.

[ionitron-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.