Waves plug ins interface weirdness in Wavelab


when I load Waves plugs into the effects on the master channel - if look at them in the master plug in chain window the Waves ones maximise horizontally and in this state you can’t change any levels - the controls freeze. By clicking back and forth above from one other effect you can get it working again, but it’s a temporary fix - it jumps back to wide and stuck setting next time you click on it.

Is there a tweak that I am missing here?

Are you using the latest version (8.5.20), and preferably in 64 bit if you are not the Mac?