Everything was working good a couple of weeks ago, but now my printer ignores the offset setting and is setting Z to where the BL Touch contacts the bed. So when I try and start up a new print, it's printing 2.5mm above the bed, and just squirting out PLA in the air.

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I've reset the offset to 0, saved settings, powered things off for a while, and gone through setting up the offset measurement and entering it again (and making sure I saved the settings), and it does not seem to work. My offset is set to -2.5mm, I've clicked Save Settings, and it's still trying to print above the bed.

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Anyone have an idea for next steps? Re-flash firmware or something?