In Grid with virtual scroll, moving the mouse outside of the Grid in some cases results in empty Grid.
This is reproduced in our demo as well:
https://www.telerik.com/kendo-react-ui/components/grid/scroll-modes/#toc-virtual-scrolling

Multiple messages has been shown in the browser's console.
Active resource loading counts reached to a per-frame limit while the tab is in background. Network requests will be delayed until a previous loading finishes, or the tab is foregrounded. See https://www.chromestatus.com/feature/5527160148197376 for more details
Reported in ticket: 1362834