How to reproduce it:
1. Open the user's attached project
2. Load '5f. Change Surface Velocity - Havok' from 'Assets' folder
3. In the Hierarchy window find 'Physics Scene Basic Elements' prefab and click on its child 'Physics Settings'
4. In the Inspector window find 'Physics Step' component set 'Simulation Type' to 'Unity Physics'
5. Hit 'Play'
6. In the Game view observe the correct behavior of objects
7. Hit 'Pause'
8. In the Hierarchy window find 'Physics Scene Basic Elements' prefab and click on its child 'Physics Settings'
9. In the Inspector window find 'Physics Step' component set 'Simulation Type' to 'Havok Physics'
10. Hit 'Play'
11. In the Game view observe incorrect behavior of objects

Expected result: Bodies on the spinning floor move in a circle, bodies on conveyor belts move in the same direction, from one conveyor to another
Actual result: Bodies on the spinning floor and conveyor belts move randomly

Reproducible with: 2020.1.0b13, 2020.1.10f1, 2020.2.0b8, 2021.1.0a2
Could not test with: 2018.4 (Havok Physics for Unity is not compatible), 2019.4, 2020.1.0a3, 2020.1.0b12 (due to errors)