It is not possible to click on the Combobox element, no error on console. I am using Chrome Canary version 74.0.3686.3
It can be reproduced on Extjs site: https://docs.sencha.com/extjs/6.5.1/modern/Ext.field.ComboBox.html
We have the same issue with events fired by some buttons on our application.
There is additional informations on Sencha forum: https://www.sencha.com/forum/showthread.php?471299-Comboboxes-not-working-on-latest-Chrome-Dev
It is working correctly with Google Chrome 72. Can someone have information on this? I did not find additional information on Chrome site or Extjs site.