Expand track key command not working

I have expand track set to OPT-E and I’ve been using this key command for years. Now its stopped working. When I press it I get a popup naming the key command and “track expand” but saying it’s “not available”. Has anyone seen this behaviour? Is there a fix for this? Thanks.

Do you mean Zoom to Selection Horizontally by any chance?

You’ll find it under Key Commands/Zoom.

I mean what is listed in key commands as “Expand track”. There is a key command assigned to that, which used to work but no longer does.