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

Steps to Reproduce
  1. Open the Editor
  2. Create two folders and sort various items from a level into them
  3. Place the second folder inside the first folder
  4. Collapse the folders and right click the top folder
  5. Go to Select > All Decendants
  6. Expand the second folder

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 

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Affects Versions4.
Target Fix4.22
Fix Commit4611465
Main Commit4676940
Release Commit4862694
CreatedSep 7, 2018
ResolvedNov 29, 2018
UpdatedFeb 12, 2019