Highpass Filters create additional High frequencies.

[Artomix]

Hi, I hope this is the right forum but I'm having some issues with using the HighPass Filters. I've tried both Chebyshev & Butterworth HighPass and the problem seems to be that additional frequencies get added by the filter in the high end. I have uploaded two pictures one before and one after using the filter. I setup the Filter with Order 3, use the Samplerate given by Iplug, Cuttoff Frequency is 4K and rippleDB is 1.0. As you can see in the screenshot the lower frequencies are removed, but now high frequencies appear. With the settings I expected the result to be complete silence. Does someone know why this is the case? I think maybe there is some volume normalization going on, but at this point I am quite lost. Would appreciate any feedback, thank you!!