title: Rapid clicks on the tab widget is causing UI freeze
body: <br/>
    Following are some information on the development environment:<br/>
  1. Qt - 5.15.2<br/>
  2. QML Embedded application<br/>
  <p>We have a QML based embedded application. We have created a custom tab widget using TabBar QML type and a rectangle to load the pages dynamically. As part a monkey testing we are clicking on the tab buttons with a very short time interval rapidly and randomly for 1 minute. After this we are seeing a UI freeze. The UI is anyway recovering after 3~5 minutes.</p>
  <p>One assumption is as the UI is getting bombarded with so many click events and processing of the same is taking time. But is there a way to confirm this?</p>
  <p>Regards, <br/>
  Bikash</p>