Tab to focus not working in mixer - confirm?

Cubase Pro 14 on Windows 10.

Using tab to change focus works in the arranger window but not the mixer window.

If I’m on the left panel I can only go to the center panel. Once. Then I can’t go left or right. Conversely, if I’m on the right panel I can only go to the center panel (via shift+tab). Once. Then I can’t go left or right.

Anyone seeing this behavior?

Thanks!