Occasionally some of the text used to describe menu options or their location in the Mac app might need to change. For instance, the former Collapse Artboards and Groups is now titled Collapse All Groups, and Text > Align Left is now Text > Align > Left.
Because of these changes, you may have to adjust your custom shortcuts to get them working again.
You can search for the new menu option by going to Help in the menu bar and searching for the option. If it has changed, go to System Preferences › Keyboard › Shortcuts › App Shortcuts and change the name of your custom shortcut accordingly.
Keep in mind that you can target a specific menu item by using its hierarchy as the shortcut name (for example: Arrange->Align->Left instead of just Left). Please note the use of -> with no spaces as a separator.
See Apple’s own documentation for more information on keyboard shortcuts.