I'm working on creating assets from boxes in Unreal Engine 5 using HDA.
I'm selecting multiple boxes within a single HDA to work on, and I end up with several HDAs created in this way.
I think I need to create an HDA for each grid to use World Partition.
However, sometimes when I repeat the same process, the boxes input into the existing HDA disappear, and I have to redo the work. Why does this happen?

And Is there a limit to the number of boxes that can be input? When I input many boxes into a single HDA, it sometimes stops working.