Hi there…There is a bug in Cubase 9 pro with the dual filter plugin! * 9.0.1 with the late november update.
I first noticed it because i had a project and i used this plugin with automation as well , i managed to reproduce it after. it only occurs with low frequency sounds and you have to turn up the resonance and play with the filter a little bit.
You can hear some strange cracks in sound ( and guys its not the resonance that i hear)
Also its not there on 8.5 ! i still have this version on my computer and it doesnt occur.
So its definitely a new version bug! Please fix it