I haven't had long to test the plugin just yet but I noticed the same thing. I'll have to check again in headphones.
Still, the tone is great. It might be worth using two instances, with the first as mono, then use the stereo pan in the second instance to move the effect around.
Other than that, indeed, there are some great tones to be found in this thing. Feeding it some growling synth bass can lead to some dirty dnb sounds. It complements my other modulation options nicely.
EDIT: Checked and no issues. Not going to trouble shoot it.
Having played around with this some more, I am very pleased I made the purchase. A thoughtfully designed plugin with a wide range of applications.