Actor Reference bug in public Array element

I’ve tried the eyedropper and direct-select (the little arrow in the circle to the left of the eyedropper) but it keeps giving me the same issue.

I’m hoping to avoid using a query because it’s not something that needs to be dynamic in-game and I’d prefer to have control in the editor while I’m building the levels.

But at this point my biggest concern is whether or not this is a bug in Unreal or I’m doing something wrong. So as to avoid it as the project scales up.