My app has a carousel and a panel next to each other in an hbox layout, with direction RTL. The panel starts hidden. When I show the panel, carousel goes crazy and parts of it become unclickable. This is due to the following Chromium bug/change in version 65:

Specifically, the change in Chrome 65 causes the onScroll function in Ext.util.sizemonitor.Scroll to fire when the panel is shown. It does not fire in Chrome 64.

Hope this helps.