DataGrid - A pager works incorrectly when the remote virtual scrolling feature is enabled in a certain scenario

Hello Devexpress,

I am having some issues with the DxDataGrid's paging when using remote virtual scrolling. I am not sure if it is a bug in the datagrid or if I am using incompatible features. Any help would be appreciated.

I have attached a sandbox that demonstrates my problem below. I believe it effects small data sets with only two pages of data.

Relevant information: The page size for the pager is 20 records
The data set has been restricted to 27 records.

Reporduce:

Problem 1:
On Opening the sandbox scroll as far to the bottom of the dataset as possible. The final row should be Id 27. The pager is still showing that the data set is on page one when all of the visible records are from page 2. This issue appears to go away on a smaller screen but I want to display more data than the grid will allow. (it is only showing ~3 records when this issue stops happening)

Problem 2:
Click on the "2" pager button to go to the second page. Scroll to the bottom the data set so that Id 27 is showing. At this point Clicking on the "1" Page button does not return the grid to the top of the page rather it just shifts the grid slightly upwards.

Problem 3:
This is mostly the same as Problem 2. Start by clicking the "Open in New Window" button in sandbox to make the Grid full Screen. Click the "2" page button and scroll the rest of the way to the bottom until Id 27 is showing. At this point clicking on the "1" page button does not return the grid to the top of the page but it also selects the "1" page button preventing it from being reclicked to return to the top of the grid.

My Sandbox:
https://codesandbox.io/s/remote-virtual-scrolling-devextreme-data-grid-paging-error-for-small-data-sets-09tus?fontsize=14&hidenavigation=1&theme=dark

This Sandbox was forked from here and then the filter and pager were added.https://js.devexpress.com/Demos/WidgetsGallery/Demo/DataGrid/RemoteVirtualScrolling/Angular/Light/