Oscillator gate reset attack noise

Hi All,
I’ve just purchased a Sub Phatty and am loving it but I have an issue. Selecting the oscillator gate reset causes an an unexpected and unmusical attack noise like a Hammond key click regardless of EG attack settings.
I was very much looking forward to this feature but can’t see myself using it because of this.
Can someone with a Sub Phatty see if they have the same issue?