cubase 8.5.20 Mixer fader channels now missing

Since I’ve updated to the latest cubase update I’ve been having issues with the mixer page. I like to work with a split screen mode when I’m mixing so that I have the mixer at the bottom of the screen and the arrangement view at the top. But for some reason now the mixer channel faders keep disappearing. I have to keep refreshing the mixer screen until they come back. But then sometimes the mixer maximizes and I cant realign it back to its original size.

I’ve attached a picture of the missing fader problem. I have a lot of work to do at this moment in time and this has now become a problem trying to work like this. Please help.

Regards

Nathan
Cubase missing mixer.PNG.jpg