Expanding text field - keyboard shortcut

The keyboard shortcut to expand a text field (cmd-shift-e) works perfectly on all my Macs except for a new iMac (24-inch, M1, 2021). I have searched to find out something else is on my computer is using the same shortcut, but can’t turn anything up.

Any ideas? I use that shortcut frequently, so it would be great to get it working again. (The problem is consistent in all browsers on this iMac).