[Bug][Grid] Virtual scroll adds empty spaces when scrolling to the bottom and then up

[filipKovachev]

Describe the bug
Currently when virtual scroll is enabled, scrolling to the bottom and then up again adds empty spaces.

To Reproduce
Steps to reproduce the behavior:

1. Open this StackBlitz: https://stackblitz.com/edit/4oq3gt-ptnfke?file=src%2Fmain.vue
2. Scroll to the bottom of the Grid with the mouse and then start scrolling up. Notice how empty spaces are added at some point:
   
   Note that the empty spaces might not always reproduce in the first attempt when scrolling but on the second or third. This issue is also reproducible here: https://stackblitz.com/edit/4oq3gt-ho5g3e?file=src%2Fmain.vue

Expected behavior
The virtual scrolling should work without empty spaces

Ticket ID: 1649777