I want to know why each ID can only collect one corresponding item now. I used to have several items with the same ID and different names. You deleted them all, leaving only one meaning.

For example, you have two command boxes, but their NBT and names are different. In the past, it was obvious that they could be collected at the same time. Why not now? ?

Well, the 15.2.0.22 version still has this function, so I switched back to the old version and solved the problem.