Bluewallet linked to Umbrel : Why are highs sats fees still applied?

Hi there, Umbrel node with liquidity connected to my Bluewallet. When sending some sats out (50k sats), bluewallet will charge around 150 sats. On Umbrel, just one sat is paid in fees. Why is that? Bluewallet fees should disapear since this is a fully non-custodial setup? Thank you