Editor World/WorldTime disappears when Entering and Exiting Play Mode

Unity: Core Runtime

6.5.X

6.6.X

Steps to reproduce:

Create a new Unity project using the Universal 3D template
Make sure Hierarchy V2 is enabled (Unity > Settings > General > Use new Hierarchy window)
Install the Entities package (com.unity.entities)
Enter Play Mode
Exit Play Mode
Observe the Hierarchy window

Actual results: Editor World/WorldTime is no longer in the Hierarchy window

Expected results: Editor World/WorldTime is in the Hierarchy window

Reproducible with versions: 60005.0a7, 6000.5.0b2, 6000.6.0a2

Can’t test with versions: 6000.0.72f1, 6000.3.12f1, 6000.4.1f1, 6000.5.0a6 (due to no Editor World/WorldTime functionality)

Tested on (OS): Windows 11, MacOS Silicon Tahoe 26.3

Notes: