Shimano R8000 11-speed Right Lever Issue -Only 9 shifts

[wingguy]

Are you feeling the cable to sense shifts or waiting for noises? The cable is all that matters.

Maybe install another cable. Maybe this one has some weird dimension of the end piece.

i have tried it connected to the derailleur, and also held tight in my hand... only 9 shifts!

i will try a new cable maybe and see if it is the cable head that is some kind of weird dimension.

At this point I wouldn’t overthink it too much, this is what warranty support is for.