Deterministic runs across linux and windows

I’ve tried setting the “enhanced determinism” flag and “substepping” in addition to “fixed framerate” to get different runs for the simulation to become deterministic.
Those settings succeeded in making different runs from the same build deterministic. So windows runs produce exact results, and linux runs produce same results (even on different machines). Yet the results from windows build and linux build are not the same and starts deviating a little as the simulations progresses.

Any help in making runs across different platforms deterministic would be greatly appreciated.