I want to maintain a low negative pressure around 250mbar. Nearly every time it wakes from sleep or after reboot it pumps to max limit (420ish mbar). I also keep setting my assumed pump speed during system boot to 3300 rpm and it keeps changing back to 4800. I also have allow lower negative pressure in standby set to yes, and standby mbar set to 80.

Is this a bug or a "feature"? would having a high flow/HFN sensor prevent this from happening unless the pump is actually going brrrr. I have a slow leak/air ingress which at 250mbar is solved by a once a week script to max pump rpm to flush out air bubbles and then reduce back down to 250mbar. Having it at 420mbar causes a much faster air ingress, seemingly nonlinear. Please refrain from the "fix your air leak advice", If leakshield would do what I tell it, it isn't a problem and the daily pump time is well within spec.