Different looks of scrollbars between Vaadin Grid and Vaadin Table in Chrom

Hey Vaadin Community,

we found an issue in our web application with Vaadin Frontend. In Google Chrome browser we see different looks of scrollbars of Grid compared with the look of Tables or other scrollable components. In Firefox browser is the look equal. The Problem are the ::webkit styles for grid-scroller and grid-scroller-(vertical/horizontal). If we remove them in styles.css we have the same look as in Vaadin Tables. Is there a better solution or is it possibly a bug.

Vaadin Version 8.6.2,
Chrome version 70.0.3538.110,
Firefox version 63.0.3