Hi Peter,
when I combine the “.virtualized = true” setting with “.dropDownAppendTo = document.body”, (because I display it in a SmartWindow), then it seems the drop down list doesn’t work correctly in Firefox 78.0.2, whereas it works in Chrome. See the following code pen: https://codepen.io/KP-Traeger12/pen/OJMoMmK
In Firefox, it will look like this (only the first item is visible):