Livebox router: no update of sensors?

Home Assistant 2023.4.6
Supervisor 2023.04.0
Operating System 9.5
Frontend 20230411.1 - latest

Just installed the Livebox router (v1.8.5).
Successfully integrated in HA with my livebox 4

The “sole” issue is that download/upload speed sensors never change

Any idea ? Thanks, Bernard.