Leak 7-11 L/min?

Hi everyone, just looked at my data after using the S9 for close to a month. I was surprised that it registered a leak of 7L/min last night (11L/min over the 174+ mins of total use). Is that considered high?

I know that when using the Swift FX, I do hear some minor leaks when I sleep on my side, but what actually happens when I'm asleep I don't know. Could it be my mouth is open? AHI is low though, less than 3, compared to 63.4 when I did my sleep study! Any suggestions as to how I can reduce the leak? It DOES sound like quite a lot of leakage, but I have nothing to base it on