Slicer 1 cannot update Slicer 2

Hello,

I do not know if this has already been solved but after looking through the forum times and times, I guess it has not been yet.

I have a slicer with the name of a project and another slicer with the % of progress.

Whenever I use one project, I can select the % of progress : 

I then choose another project however, the Progress keeps being the same, it does not update with the available and correspondent value. Thus, nothing shows up.

How can I automatically change the value of the Progress whenever I change the Project?

Thank you in advance for your help,

Adeline