Novation Launchkey 49 mk3 problems with Cubase 13

Cubase 13 should automatically recognize my Novation Launchkey 49 mk3. It does, but when I open a project, the 16 pads are not lighting, but in the screen I can read “Cubase”. After I disable the controller script for this keyboard and then enable it again, everything works okay. I also have a Novation Launchkey Mini mk3 which doesn’t have this problem. For a few days I made a Chat-session with the helpdesk of Novation for about 2 (!!) hours. They have tried many things to help me, but they couldn’t solve the problem and are still working on a solution. Everything is up-to-date (Windows 10, Cubase 13 and the firmware of my Launchkey 49).
Is there anyone here who recognizes this problem and possibly has a solution???

Please check my answer here.