Displaying an hourglass or so during task transition

Sometimes, due to the contribution of different mechanisms, the time it takes for a task transition is rather long (several seconds).
For example, a task may execute some time-consuming connectors on exit, and maybe the next task may call a subprocess…
And during that time, the user just has to wait, with no apparent feedback. So, users complain that no hourglass or other “wait” icon or animation is showed.
Is there a way to overcome this limitation?

I think you should have a look at this interesting Project I did at the end of last year. It explains how to add a “please wait” to the template of the confirmation message between forms/tasks, with some javascript to load the next task once available:

If you want to customize the messages displayed on this confirmation page, there is many ways to do it. There is a good example of how to do it in the little game “Bonita Escape”, also available in Projects. Every task as many submit buttons. Depending the submit button chosen by the end user, a different message will be set in a text variable, and then displayed:

Hope this will help you !

Thank you for your suggestion, it is very interesting, but for sake of simplicity I think I will just show a “Please wait” confirmation message.