Show/Hide Zone shortcut not working on mixer. C9 & 9.5

I have a feeling this was mentioned before, I might have mentioned it before also.

In the arrange window I am able to show or hide the left, right and lower zones with key commands. (Shift and arrow left, right or down and I use shift arrow up to bring up the lower transport)

When I am focused on the mixer these key commands do not function even though if I hover my mouse over the mixer show/hide zones control it shows me the key command is associated with the control.

Please fix