Preview: Scene preview looks empty

[EzioDCL]

Describe the bug When previewing a scene, all scene entities are missing, This seems to happen more often in scene layouts bigger than 6x6 parcels. Tested on v0.6.0

To Reproduce

1. Create a new scene
2. Set the layout size to 8x8 parcels
3. Add some elements such as floor tiles or asset packs entities
4. Click "Preview"
5. Notice that when the explorer finishes loading, you are navigating an empty scene

Expected behavior All scene entities should be present in the previewed scene.

Screenshots Actual scene vs. previewed scene

[pravusjif]

The E@ is not liking big scenes (7x7 or bigger) that have 50 or more entities in their main.crdt file.

I continue debugging.