I find the issue when I open the Dash, hit down (Shortcuts title is focused), down again and Media Apps is selected.
The Shortcuts title has no function, and so should not be focus-able.
In the Apps Lens, the Apps Available for Download sub-lens has no view-more toggle, but it's title is still focus-able.
If I go into Dash and type enough letters so that all available apps are shown (no drop-down/view-more toggle), it works as expected: not focusing the lens titles.
If I go into Dash and type too few letters, so that some apps are hidden, and a view-more toggle is shown, then this view-more toggle is focused.
In the Files Lens the first sub-lens's view-more toggle does not glow when focused, and none of the Music sub-lenses's view-more toggles glow when focused.
When a view-more toggle is focused, pressing Enter will operate it, but Space will not (pressing Space to operate instead returns focus to the search box and types a space character).
I find the issue when I open the Dash, hit down (Shortcuts title is focused), down again and Media Apps is selected.
The Shortcuts title has no function, and so should not be focus-able.
In the Apps Lens, the Apps Available for Download sub-lens has no view-more toggle, but it's title is still focus-able.
If I go into Dash and type enough letters so that all available apps are shown (no drop-down/view-more toggle), it works as expected: not focusing the lens titles.
If I go into Dash and type too few letters, so that some apps are hidden, and a view-more toggle is shown, then this view-more toggle is focused.
In the Files Lens the first sub-lens's view-more toggle does not glow when focused, and none of the Music sub-lenses's view-more toggles glow when focused.
When a view-more toggle is focused, pressing Enter will operate it, but Space will not (pressing Space to operate instead returns focus to the search box and types a space character).