Mac Mini display only holds calibration for one second (solved)

This problem carried forward from a 2018 Mini 8,1 (Intel) to a new 2024 Mini M2. It’s truly annoying - I can calibrate the screen and it looks perfect for all of one second, then goes back to the bright, low-contrast original. Any thoughts?

Edit: I shut off “increase contrast” under accessibility in case that was it.

Edit #2: solved it by quitting f.lux just after posting this. I feel foolish now. Was never Apple’s fault!!!

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