[Android] things disapear after showing a interstitial ad

After closing an interstitial ad some of the buttons and elements in the app disapear.

Loading the ad and events work correctly:
this.ad.onAdEvent((event, error, data) => { switch (event) { case AdEventType.LOADED: console.log('ad loaded'); this.ad.show(); break; case AdEventType.CLOSED: this.routerExtensions.navigate(['postcard-viewer', Constants.Modules.PostCardEditor.result]); break; case AdEventType.OPENED: break; case AdEventType.IMPRESSION: break; case AdEventType.FAILED_TO_SHOW_FULL_SCREEN_CONTENT: console.error('InterstitialAd failed to load:', error); this.routerExtensions.navigate(['postcard-viewer', Constants.Modules.PostCardEditor.result]); break; } }); this.ad.load();

Showing the ad also works correctly.

Once the ad is closed, some buttons and elements are not shown anymore for example:

<Button *ngIf="stateService.freeCard && !loadingQuota && quotaAvailable" [isEnabled]="!showspinner" class="pcc-dark-button send-button" [text]="'viewer.backside.free-send' | translate" actionKey="SEND" (tap)="onSendClick()"> </Button>

Start from the interstitial ad event handler and the CLOSED navigation path shown in the issue, then reproduce the problem by closing the ad on Android. Compare the view state before and after navigation; done means the buttons and other elements remain visible after the ad closes.