Hi,
I have a problem with the "Time Tracking" functionality for a given project. It does show the hours allocated to a specific task :

But when I select the epic related to this task, the "Time tracking" feature is not visible. I expect it to show the worked hours of all tasks contained in the epics. (screen 2)

It does work on other projects though (screen 3) :

But I can't find the setting that's causing the problem in my project. Can you help me ?
Thanks in advance.