Reproduction steps:
1. Create a new project
2. Click File > Build Settings > Build
3. Open the Terminal, and run the player with the ‘-batchmode’ argument

Expected results: Player creates an off-screen window
Actual results: Player creates a visible window

Reproduced with: 2022.3.60f1, 6000.0.43f1, 6000.1.0b11, 6000.2.0a7

Reproduced on: Ubuntu 20.04, Ubuntu 24.04
Not reproduced on: Windows 11