unfortunately, the CF is finicky with cookware detection. i talked about this earlier in the thread.
i have a lot of slightly-to-moderately warped stainless cookware that works fine 100% of the time on my miele induction range but works inconsistently on my CF.
sometimes, it works fine on CF. sometimes, it stops working mid-cook. other times, it won't work at all.
it's a shame because it's an issue that could be fixed in software. i emailed polysci and asked them to release a fw update with a debug/calibration menu that could let you adjust the coupling detection threshold, but obviously they don't want to do that. they don't even trust their users to update their own fw anymore lol.
it does work fine with modern cookware "designed for induction" that is in good condition (perfectly flat-bottomed).
but if you have "borderline" cookware, don't expect it to work even though it could (and should).