TallTone

I just got one of these and I have to ask if you have tried using the vibrato setting on a high gain situation. The reason I ask is because the chorus part of the pedal is to die for! No signal loss or loss of highs. As soon as I turn the vibrato switch I can hear everything above 900Hz go bye bye. Not just a little, we're talking the muddiest telephone studio effect I've ever heard. I am hoping it is broke or something because the chorus is to die for and it seems like the vibrato should be too. Thoughts?