Recipe book doesn't update crafting grid if one of its slots already has enough items to craft as often as possible

In 1.12-pre5 this is NOT fixed for case 1, where all materials are in the crafting grid and none are in the inventory.

When all materials are in the crafting grid, the recipe shows as unavailable, clicking on the recipe empties the crafting grid and shows a "template" (greyed out/transparent) recipe instead. At this point the recipe becomes available and acts normally, since all materials were moved into the inventory.

@unknown, that is another issue. Please create a new ticket (if one doesn't exist already)

@SunCat after some further investigation, reported as MC-117758