[Grid] Programmatically scrolling a Grid with virtual scrolling after updating its data with different number of items empties the component

[zstoyanova9]

Describe the bug
When trying to update the data of a Grid with virtual scrolling enabled to a new one with a different number of items, and then use the scrollTo() method to programmatically scroll the component, it is displayed as an empty Grid with no records.

To Reproduce

1. Open the following StackBlitz example - https://stackblitz.com/edit/angular-1dooxc-ryvow4
2. Scroll to the bottom of the Grid manually.
3. Click the "Scroll to 0" button.

Expected behavior
The Grid should not be displayed as empty and should be scrolled to the defined scroll position.

Workaround
Execute the scrollTo() method in a setTimeout() function:
setTimeout(() => { grid.scrollTo({row: 0, column: 0}); })

StackBlitz example with workaround:
https://stackblitz.com/edit/angular-1dooxc-xh3gmt