legato mode between selected = never stored


for years… decade i’m sure now. With cubase or now nuendo i have tried to select "Preferences / Legato Mode : Between Selected Notes Only.
i saved it in my pref millions of time, when i load the pref i see it activated but no matter what after a while it’s deactivated.
i made sure i have no shortcut to it…
any reason why ? anyone has this