Keyboard shortcut cmd+up/down stopped expanding/collapsing

in macos sequoia/chrome 150.0.7871.184
work in desktop app & safari

Always report WF version number, since things are in flux. (Copyable by clicking on version number in the WF settings dialog).

Working as expected for me in WF 4.3.2610091337 [beta, edge, win]

Maybe a browser interaction? Try in a private / incognito window in chrome to see if it’s from a browser extension?