Saved the waveform taken with active filtering enabled. When reopened, filtering is OFF but can be set to active.
My question was why is the setting of Active filtering not remembered when set as user default

Since upgrading to Pico 6 software, Activation of Lowpass Filter will not save as user default for startup setting.
Other options like scales, trigger point etc will save and be active at startup.
I am using pico 6.12.9.2917 with scope 3205MSO