cubase spectral comparison eq disappearing. Cubase 10 pro bugg

So when i start a new project in Cubase 10 pro and record some tracks and then use the Spectral comparison eq on them and it all works fine. But after a while when i press the (e) button on the channel again the comparison mode is not there, there is only the equaliser for the channel left. Why is that? anyone know how to fix it. I really want to have the feature where i can compare my instruments frequencys to each other.