Yeah, I had the same problem with my Powershifter on my Ashton kit, but when I got the Mapex it had slightly higher struts on the high-hat stand, so the chain didn't collide with the strut at any point.
I was almost preparing to get some of that non-slip matting, and glue it to the underside of the footboard, or sit the pedal on it. Maybe something to consider.