Why not just start higher from the beginning?
It's common for people to be uncomfortable when starting out at 4 cm and especially so with nasal pillows. Not enough air movement happening in terms of comfort. We won't suffocate but it sure can feel like we are.
Change your minimum starting pressure to something more comfortable...maybe 6 or 7 and see how it goes.
Don't know how?? Manual explains how.https://sleep.tnet.com/home/files/resme ... -guide.pdf