My 2018 CX-9 GT also has been having issues with the recent colder temps we have been getting in Canada.The rear heating vents dont seem to work to well and when ever I have passengers in middle row, the middle row windows all get very badly fogged up. Event the front windows occasionally get fogged up even with hear on auto setting at 21.5 degrees Celsius and window defroster and defogger on. Anyone else have this issue?