Fast Scroll in Mixer Window not working

back in my old Cubase 6 - i could click and hold the mouse wheel button and move the mouse to drag the mixer window very fast.

In cubase 10 - this feature is not working. Holding the mouse wheel makes the cursor turn into the hand which looks like it is ready to drag- but it instead clicks as if you click the left mouse button.

Anyone else notice this? or is there a solution?