While doing any editing action in blueprint editor for any array in an Actor Component it auto-collapses arrays properties.
No issue with Actor derived classes that I’ve seen, just components.
Reproduction:
Create new Actor Component.
Edit component (don’t need to add it to anything).
Add array variable of any type.
Edit array default value:
Add an element. Properties will remain collapsed (expands while doing same in Actor or other classes).
Expand element, edit added element.
-Entire array properties will collapse.
Continue adding elements.
Expand all.
Edit any element.
-Entire array properties will collapse.
Tested with two different projects, same behavior on my machine.