After loading a SubLevel from the PersistentLevel of WorldComposition, the offset of WorldComposition is applied when loading the SubLevel alone

When loading a Sub Level from the Persistent Level of World Composition, the offset of WorldComposition is applied when loading the Sub Level by itself. The offset can be applied repeatedly when reloading the Persistent Level and Sub Levels. This is a regression from 4.19.2 (CL-4033788)

This was reported and tested in 4.20.2 (CL-4302132). This was reproduced in Main 4.21 (CL-4329255)

1. Download and open the attached project
2. Open Sub00 and Sub01, which are SubLevels, alone to confirm the location of the Cube, which is a mesh on the floor, is (X=0,Y=0, Z=0)
3. Open PL, which is a PersistentLevel, and load Sub00 and Sub01 via the "Levels" window.
4. Open Sub00 again to confirm that the Cube has moved by the tiles of WorldComposition (X=5000,Y=0, Z=0)
5. Save Sub00
6. Open PL again and load Sub00 and Sub01 via the "Levels" window to confirm they are affected by the offset twice.

Results: The Sublevels become offset from their origin point in their own level

Expected: The Sublevels aren't offset when loaded in the Persistent Level.