Blank space is Displayed at the Bottom of DropDowns in Virtual Scroll for Angular 8

Question

This Issue is Occurring when I modify the DropDown Array, like if a DropDown array containing a single element has been replaced by an array of more than 8 elements.

Same time onScroll(start, end) method is called with value start=0 and End=6 so here it is only Displaying first 6 elements, Instead of remaining 2 elements it is Displaying Blank space.

  <ng-select ngSelectEditFocused [triggerCD]='triggerCD$'
             [items]="entitiesBuffer"
             (click)="onClick($event)"
             (search)="onSearch($event)"
             (scroll)="onScroll($event)"
             (scrollToEnd)="onScrollToEnd()"
             (open)="onOpen()"
             (close)="onClose()"

  </ng-select>