why do I have to use all the spaces on the craft table for mass crafting?

[nzmyOvO]

why do I have to use all the spaces on the craft table for mass crafting?

I also get the old craft that was in the slot.
for example, if I first put a tnt and then I change it to a repeater and I try to craft a repeater, I get the tnt.

2024-11-28.20-01-46.2.mp4

2024-11-28.20-06-21.2.mp4