Scrolling with the arrow keys in the mixer.

My Specs:

Cubase Pro 8.5
Mac OSX Yosemite 10.10.5
MacBook Pro (Retina, 15-inch, Late 2013)
Processor 2.6 GHz Quad Intel Core i7
Memory 16 GB 1600MHz DDR3

Details to recreate issue: Check the link for recreation

https://www.dropbox.com/s/ezir60sk4sumer8/Scrolling%20with%20the%20arrow%20keys%20in%20the%20mixer.mov?dl=0