In the multi-pane model, focus_next_sibling and focus_prev_sibling are pane-1-only, which means that if you were in the pane 8, triggering either could be back to the pane 1.
In the multi-pane model, focus_next_sibling and focus_prev_sibling are pane-1-only, which means that if you were in the pane 8, triggering either could be back to the pane 1.