Using Alt-Drag to move a copy of an actor from the persistent level to a sublevel (when the sublevel is selected as the current level in the Levels window), the persistent level is getting marked as dirty.

Clarification: This does not only affect the persistent level. This will also affect a sublevel if the object is moved from SublevelA to SublevelB, for example.

Found: 4.17.1

Reproduced: 4.16.3 and 4.18 Main CL# 359616

Steps to Reproduce
  1. Open the editor
  2. Create two levels (LevelA and LevelB)
  3. Open Level A and Save All
  4. Open the Levels window (Window->Levels)
  5. In the Levels window, select Levels->Add Existing and add Level B as a sublevel
  6. Select the Persistent Level as the Current Level (double-click on it)
  7. Add a cube to the Persistent Level and Save the level
  8. Back in the Levels window, select LevelB as the Current Level (double-click on it)
  9. Back in the viewport, Alt-Drag to copy the cube into the sublevel

Result: The persistent level gets marked as dirty

Expected: Only the sublevel would get marked as dirty.

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Affects Versions4.164.174.18
Target Fix4.19
Fix Commit3716885
Main Commit3739980
Release Commit3813083
CreatedAug 18, 2017
ResolvedOct 24, 2017
UpdatedFeb 4, 2019