Reproduction steps:
1. Open the attached “IN-94788 Particle Emission Bug - FAV.zip“ project (link in the internal comments)
2. Open the “Particles” scene
3. Go to the Game view (make sure the “Particle System” GameObject is not selected in the Hierarchy)
4. Enter Play mode
5. Observe the Game view

Expected result: The “Particle System” GameObject is emitting particles
Actual result: No particles are being emitted

Reproducible with: 2022.1.0a13, 2022.1.24f1, 2022.2.21f1, 2022.3.58f1, 6000.0.41f1, 6000.1.0b9, 6000.2.0a6
Not reproducible with: 2021.3.49f1, 2022.1.0a12

Reproduced on: Windows 11 Pro (23H2)
Not reproduced on: No other environment tested

Notes:
- The issue reproduces randomly about 50-70% of the time
- The issue reproduces the most often when entering Play mode while already being in the Game view, and the “Particle System” GameObject() is not selected in the Hierarchy
- Even though the Particle System is not emitting particles, ParticleSystem.isPlaying and ParticleSystem.isEmitting are returning “True”
- If the user moves from the Game view to the Scene view during Play mode, the “Particle System” starts emitting particles (sometimes, selecting any of the GameObjects in the Hierarchy or any of the assets in the Project window can also trigger particle emission)
- Reproducible in a new project
- Reproducible in the Player (reproduced 100% of the time during testing)