Play Mode Scenarios with invalid names show up in the list when another scenario with a valid name is added afterward

How to reproduce:

1. Create a new project
2. Install the Multiplayer Play Mode package
3. Create a new Play Mode Scenario with an invalid name (e.g., “… …”)
4. Press Enter
5. Observe the Play Mode Scenarios window (the scenario with the invalid name is not shown)
6. Create another Play Mode Scenario with a valid name (“PMS1“)
7. Observe the Play Mode Scenarios window

Actual result: Both scenarios (with the invalid name and a valid name) are displayed
Expected result: Only the scenario with the valid name is displayed

Reproducible in: 2.0.0-pre.1, 2.0.1 (6000.4.0a2 (79bd4f638ac0), 6000.4.0b5, 6000.5.0a5)
Not reproducible in: 1.6.3 (6000.0.66f1, 6000.3.5f1, 6000.4.0a2, 6000.4.0b5 6000.5.0a5), 2.0.0-pre.1, 2.0.1 (6000.3.5f1, 6000.4.0a1)
Could not test in: 2.0.0-pre.1, 2.0.1 (6000.0.66f1) (Package versions not compatible with this Editor version)

Reproduced on: Windows 11 Pro (25H2)
Not reproduced on: No other environment tested

Notes:

• The invalid name scenario cannot be deleted from within the Play Mode Scenarios
• The invalid scenario is not serialized, but it is displayed regardless
• The invalid scenarios disappear after the Editor has been restarted
• There is a regression both between the package versions (1.6.3 -> 2.0.0-pre.1) and the Editor versions (6000.4.0a1 -> 6000.4.0a2)
• Not reproducible with slash (/,) characters