Just found a skeleton spawner and made a quick xp farm. Picked up some bows and wanted to combine them in my crafting inventory. When I shift click the bow that is repaired, my inventory fills up with bows.
Replicated it twice.
Environment
Normal world
Duplicate of MC-46715 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.