Selecting all descendants of a folder hierarchy in the world outliner doesnt accurately show what all is selected. This does not always occur and is a visual bug. The items in the level are still selected.
Found in 4.18 CL# 3832480, 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# 4348893
The items in the second folder will not be highlighted in the world outliner however they are still selected in the level
The world outliner would accurately show all items highlighted
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-63845 in the post.