cdk-virtual-scroll-viewport, blank area at the top and bottom of the scrolling areas when user is scrolling quickly

[Adam-Michalski]

It tooks a lot of time to rerender items when scrolling fast enought to reach end of buffer, it freezes for about 1-3 before items are displayed.

 <cdk-virtual-scroll-viewport
    #viewport
    [itemSize]="40"
    [minBufferPx]="itemBufferCount * 40"
    [maxBufferPx]="itemBufferCount * 40"
  >
    <ul>
      <li style="height: 40px">

Scrolling down

Scrolling up

In performance this takes a lot of time

Thera are oslo many warnings while scrolling

[arumuganainar73]

Any solution for this ?