If we click on combo box, text box or some items in grid, the server takes long time (3-7secs) to respond. The loading indicator on top keeps loading until the request completes. Migrated vaadin 7 application to spring boot 1.3.8.RELEASE and the application (jar) is running on embedded tomcat server 8.0.37. Before the application (war) was running in a standalone tomcat server, it was working fine.