could be the multifunction switch going bad. or a damaged wire/short in the column.
you can take it apart and check it out. if you dont know how i can help you with that.
sometimes you can take the switch off and clean the contacts inside. then re grease it with dielectric grease. but if its contacts are worn out or parts are broken you'll prob need to replace it. you can find them cheaper online rather than a dealer or autodrones.
you do need to pull the steering wheel off and remove the two plastic parts around the column and switch. the harness is down the column on the right i think. kinda tough to get to but it can be done without dropping the column brace. think the torx bits are T25 that remove the plastic cover and multifunction switch.
and Welcome to AF. and sorry for the very late reply