Playback options not changing anything

I want to remove some of the humanisation by changing note start positions to 0% and note durations to 100%, but after changing to these settings and clicking apply, it doesn’t seem to actually be changing anything in the project. All the factory default humanisation is still there, including any new notes I add after changing the settings, and exported midi still has the humanisation.

What am I missing here?

Can you attach a simple project that reproduces the problem, Darryl? What version of Dorico are you using? What playback device(s) are you using?