How to reproduce:
1. Open the user's project
2. Open the "SampleScene" from Assets > Scenes
3. Make sure that the Scene window is closed
4. Enter Play mode
5. Open the Profiler window and search for "ParticleSystem.Update2" under the CPU module
6. Change the Y Rotation of the "Main Camera" GameObject to 90
7. Disable and enable the "ParticleSystem Root" GameObject

Expected result: ParticleSystem.Update2 has 0 calls after 6th and 7th steps because the particles aren't in the FOV of the Camera
Actual result: ParticleSystem.Update2 has 100 calls after the 7th step as if it was in the FOV of the Camera

Reproducible with: 2017.4.40f1, 2018.4.22f1, 2019.3.11f1, 2020.1.0b8, 2020.2.0a9

Notes:
-This still reproduces if 4th and 6th steps are switched
-This doesn't reproduce if the "ParticleSystem Root" is disabled before rotating the Camera and enabled afterward