If new crafting recipes become available, they don't show up in the interface unless you cause it to refresh in some way.
- Start out not having a recipe yet for ladders
- Open inventory and open the new crafting interface, with the compass tab ("all") selected.
- Manually craft a ladder. You'll see a toast about new crafting recipes being added.
- Look through the recipes.
The new recipe will appear.
The new recipe doesn't appear.
Change tabs on the side or close and open the new crafting interface.