Essentially, A bug in --
[Link Removed]-- comes up with only customized struct property.
If a struct doesn't have customization, it can be displayed compact without "Element X" node hierarchy.
It is the same as UE4.23 behavior.
I write a code for it.
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-87321 in the post.