Yeah - it's every model. I've just upgraded to 3.4.1 and on my previous version - 2.7 - it also worked fine. I've noticed other settings don't work either: Infill Density, Infill Pattern, Wall Thickness, Wall Line Count. The list of settings that work is shorter than those that don't. Changing profiles doesn't help. Even when I switch to recommended settings, I can't change infill density, only layer height and build plate adhesion. I re-installed Cura and it hasn't helped.