Shulker box/dye duplicate bug

All you need to dulpicate shulker box (or any dye):

1) Put shulker box and dye into the crafting window

2) Try to change the position of the item you want to duplicate

3) On 1-4 try you will get glitched item. Then put it on crafting grid

4) Shift click on all items in the crafting window so they will be in the inventory. Close and open the inventory, then drop (Q) or place your duplicated items so they will stay and don't disappear

Doesn't work with other items

Also, for some reason i didn't get colored shulker box recipe (i can craft shulker boxes, but not to change their color) , so may be that's the reason

https://youtu.be/wClwfJRxeLY