4.12 P3 - Loading Screen on PreLoadMap is NOT fixed!

Hi all, just want to express a little concern. The loading screen setup as shown here no longer works in 4.12 and hasn’t since preview one:

However, this has been marked on the preview thread as fixed, even though it isn’t.

Okay this appears to have been fixed, but only in packaged builds. How come it doesn’t work in editor anymore? Will mark resolved anyway.