I can confirm it's LibCustomMenu, with the currentversion I get an error message at UI load and list key is greyed out with AwesomeGuildStore.
I first disabled AwesomeGuildStore and was able to list a recipe with the keypress / doubleclick on item.
Next I replaced LibCustomMenu with an earlier version from my backup and enabled AwesomeGuildStore again and was able to use binded key or doubleclick again to list an item.