All of a sudden the interior fogs up (two or three people inside) when the heat control is on the foot symbol and/or on the center outlets in my 2020 Signature. Doesn't do it when set on the windshield symbol. Only takes about 5-8 minutes after starting to drive. Never had this problem before and just started after having my annual inspection by the dealer (no issues). I also just put in a new cabin air filter (arrows pointing down). Never had the issue before. Any ideas what the problem could be?