How to get just one chick sound?

I would appreciate some help with my hi-hat settings. I have tried searching the forum, but I can't figure out how to get rid of an unwanted extra chick sound I'm getting. Whatever I try, there is an extra chick somewhere between 40-50 (CC value) when moving the variable pedal slowly downwards. I don't know if this has to do with short/long threshold settings (I have them at their default values of 115/16) or some other settings - or if it's just a "feature" of Megadrum?