Reproduction steps:
1. Open the attached “TerrainCollider.zip” project
2. Open the “SampleScene”
3. Select the “Particle System” GameObject from the Hierarchy
4. Observe the Particle movement against both Terrain GameObjects
Expected result: Particles bounce off/collide with both Terrains
Actual result: Particles collide with only one of the Terrain and fully go through the other Terrain
Reproducible with: 2023.3.0b2, 6000.0.33f1, 6000.1.0b1
Not reproducible with: 2021.3.47f1, 2022.3.55f1, 2023.3.0b1
Reproducible on: Windows 10, Windows 11
Not reproducible on: No other environment tested