Are you balanced and centered over your board? I recently discovered and corrected some chatter during heelside turns while riding switch on steeper terrain. I fixed it by riding with my body a little further downhill than before. I really didn't think I was leaning up the hill. I'm an instructor, I don't lean uphill. Beginners do that. Well, I was doing it too. I also had some icy conditions show me that I lean into my turns more than I thought.
Two questions -1) what exactly is chatter? I think I know, but haven't actually seen/heard a definition. And 2) isn't it the idea to lean into the turn? I feel like I'm balanced but shift to 60/40 or 70/30 lead foot to make a turn.
Just also wanted to thank all you teacher here in this forum - you've brought me light years!