Need to press Up button Twice - Fibaro Roller Shutter 2


I installed and calibrated the Fibaro Roller Shutter 2 (Option 29 set to 1).

All is OK, but if i press the UP button it goes up to the top but the button to go DOWN remains grayed out until i press --again-- the UP button?

Why is that?
It 's annoying because if i am remote, I don’t know if it is up or down…

here how it will look like when the Venetian is completely open…why the DOWN botton is gryed out? how to fix that?