LandscapeStreamingProxy do not properly save z offset from world composition, level property.

LandscapeStreamingProxy seems not properly saving z offset from level details when using world composition. It is reset to 0 when reopening the project. z position value from level details is saved.

1. Create a new level, Save
2. Enable world composition
3. Import attached tiled landscapes or create a new one
4. Load all the tiled landscapes
5. Change Z position of tiled landscape from level details window
   • The LandscapeStreamingProxy is showing changed z offset
6. Save all
7. Reopen the project
8. Load all the tiled landscapes

Expected Result:
The LandscapeStreamingProxy is keeping last changes(z offset), z position from level details is remaining same.

Result:
LandscapeStreamingProxy is located at the position before adding z offset(reset). The z offset in the level details is remaining same.