OSC & Master Video Level

I try to modify the Master video level using OSC but I can't get it working.

I've tested your example with an OSC track & a loop server, it works ok.

I've also tested with a keyboard interaction, it works ok.

But when I try with an OSC message from another software like companion using "/millumin/videoMaster 0.5" for example, it doesn't work but other messages like "/millumin/layer/media/speed 0.5" work ok, so...

Any idea ?

Thx