Using BondTech CHT 1.8mm nozzle with Luban

Hi there, I bought a 1.8mm nozzle and I can swap it on the hot end of my A350. On Luban, when I go to the “Select Machine” page, where I can chose the nozzle diameter, I click on the +Add button, enter 1.8 and it automatically “corrects” to 1.2 and won’t let me use 1.8… Is there a way to bypass this limitation ?