Typeahead dropdown not showing on key stroke in Android Chrome/FF

Describe the bug Hi! Appreciate your lib very much but I’m having a little trouble with typeahead feature. Hope you could help me here.

Here’s my setup which is pretty standard:

<ng-select [ngModel]="[]"
           [items]="tags$ | async"
           [typeahead]="tagsSubject$"
           [bindLabel]="'fondname'"
           [addTag]="false"
           [multiple]="true"
           [hideSelected]="true"
           [trackByFn]="tagsTrackByFn"
           [loading]="tagsLoading"
           [disabled]="disableTagsInput"
           [clearable]="false"
           [clearOnBackspace]="false"
           [placeholder]="'Search: Name, ISIN, Ticker'"
           (add)="tagAdded($event)"
           (remove)="tagRemoved($event.value)">
</ng-select>

public tags$: Observable<EtfQuickSearchProduct[]>;
public tagsSubject$ = new Subject<string>();

this.tags$ = this.tagsSubject$
      .pipe(
          tap(() => this.tagsLoading = true),
          debounceTime(500),
          distinctUntilChanged(),
          switchMap(query => this.dataService.quickSearchRequest(query, 5)),
          map(data => data.count ? data.results : []),
          tap(() => this.tagsLoading = false),
          catchError(() => of([])),
      );

Everything works just fine on desktop Chrome, Firefox, Safari and on iOS Safari. But on Android Chrome and Firefox typeahead doesn’t work as expected. tagsSubject$ pipe is firing only after blurring input or entering ‘space’ symbol, not after last letter entered. Hitting ‘Enter’ also doesn’t help.

Expected behavior On Android Chrome/FF dropdown should API call should fire and dropdown should appear after letter is entered.

I suspect it has something to do with ComposeStart/ComposeEnd/Input event for inner input.

Screenshots

Smartphone (please complete the following information):

• Device: OnePlus 5
• OS: Android 8.1.0
• Browser Chrome 75.0.3770.143

Additional context

• Angular: 8.1.2
• ng-select: 3.0.5

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[achimha]

Any idea how to fix this other than downgrading ng-select?