Physics seems to turn itself off

Hi, I am trying to create a high speed anti gravity racing project. The only Mesh I have is a static mesh cube with simulate physics turned on. It’s running well at slower speeds, but at higher component velocities (above 20,000), it will break. The print strings from the line traces no longer appear and the camera is frozen with the mesh nowhere to be seen. When exiting the test (PIE or standalone) The error message says “has to have 'Simulate Physics enabled if you’d like to AddForce” repeated a few times.
It is as if it just turns itself off midway through the test.
Any idea what is happening here please?