When navigating through the application, the groupboxes cannot be accessed by the keyboard when in the collapsed or quickaccess state. Neither arrow keys nor tab can reach it.
Example (see that focus jumps to the backstage button):

Environment
- Fluent.Ribbon: 9.4
- Windows: Version 10.0.19044 Build 19044
- .NET Framework
When navigating through the application, the groupboxes cannot be accessed by the keyboard when in the collapsed or quickaccess state. Neither arrow keys nor tab can reach it.
Example (see that focus jumps to the backstage button):

Environment