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You haven't stated the wheels unless I've missed it but sounds like the wrong type of brake pads were used for the rim material possibly so it could be a user error type of situation unfortunately.
Admittedly I can't quite get my head around what is going on but surely it is either the wrong material in the brake pads for those wheels or some sort of contaminant. Maybe you are using brake pads meant for aluminium rims with carbon rims or vice versa?