Primary parameter increase/decrease in channel tab

Cubase Pro 13.0.30. Windows 10.

If I’m in the project window and set focus to the channel tab (either by the tab key or clicking at the top of the channel tab), the primary parameter increase/decrease key commands have no effect. However, if I click on the fader or on the track name at the bottom then the key commands work as expected.

It would be desirable to just tab over and make the adjustment directly. It would be even more desirable for those key commands to work anywhere regardless of focus.

Has anyone run across this or have advice?