Created Entities are not destroyed when closing a SubScene and the Entities package is located in a folder other than the project's folder

How to reproduce using Entities package version 6.6.0:
1. Create a new folder on your drive (e.g., /Users/<username>/Documents/Source/ent6.6.0/unity/Packages)
2. Upload the packages located in the attached “Packages.zip” file to the created folder
3. Open the attached “IN-148537_ent” project
4. Open the Finder
5. Navigate to the project's Packages folder
6. Open the “manifest.json”
7. Add these lines to it:
"com.unity.collections": "<the path of the folder created in the first step>/com.unity.collections",
"com.unity.entities": "<the path of the folder created in the first step>/com.unity.entities",
"com.unity.entities.graphics": "<the path of the folder created in the first step>/com.unity.entities.graphics",
8. In the Editor, open the “SampleScene” scene
9. In the Hierarchy window, select the “SubScene” GameObject
10. In the Inspector window, repeatedly open and close the “SubScene”
11. Observe the Hierarchy window

How to reproduce using Entities package version 6.5.0:
1. Create a new folder on your drive (e.g., /Users/<username>/Documents/Source/ent6.5.0/unity/Packages)
2. Upload the packages located in the attached “Packages_650.zip” file to the created folder
3. Open the attached “IN-148537_ent_650” project
4. Follow steps 4 through 11 provided in the first reproduction method
5. If the results are as described in the expected result, then open the “SampleScene” again
6. In the Hierarchy window, select the “SubScene” GameObject
7. In the Inspector window, repeatedly open and close the “SubScene”
8. Observe the Hierarchy window

Actual result: Every time the “SubScene” is opened, a new Entity is created but it isn't destroyed when the “SubScene” is closed
Expected result: Every time the “SubScene” is opened, a new Entity is created and when it is closed, the created Entity is destroyed

Reproducible with: 6.5.0 (6000.7.0a2), 6.6.0 (6000.6.0b7, 6000.7.0a3)
Not reproducible with: 6.5.0 (6000.7.0a1)
Could not test with: 1.4.8 (6000.0.81f1, 6000.3.21f1), 6.5.0 (6000.5.7f1) (Upon opening the scene again, errors were constantly being thrown)
Fixed in: 6.7.0 (6000.7.0a4)

Reproducible on: macOS (M4) (26.5.2)
Not reproducible on: No other environments tested

Note: This issue only reproduces when the packages are located in a folder other than the project's folder