Question Loading Scene Causing Crash

Hey, I'm having some trouble loading a new level, here's the code:

Code (CSharp):

1. EntityManager manager = World.DefaultGameObjectInjectionWorld.EntityManager;
2. manager.DestroyEntity(manager.UniversalQuery);
3. manager.CompleteAllJobs();
4. SceneManager.LoadScene(0);

But I keep getting this error:
InvalidOperationException: The previously scheduled job HavokSimulation:SyncJob reads from the Unity.Collections.NativeParallelHashMap`2[Unity.Entities.Entity,System.Int32] SyncJob.World.CollisionWorld.EntityBodyIndexMap. You must call JobHandle.Complete() on the job HavokSimulation:SyncJob, before you can write to the Unity.Collections.NativeParallelHashMap`2[Unity.Entities.Entity,System.Int32] safely.
Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckWriteAndBumpSecondaryVersion (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) (at <24d45e813e524a99bfb7a145158a7980>:0)
Unity.Collections.NativeParallelHashMap`2[TKey,TValue].CheckWrite () (at Library/PackageCache/com.unity.collections@1.4.0/Unity.Collections/NativeParallelHashMap.cs:558)
Unity.Collections.NativeParallelHashMap`2[TKey,TValue].Clear () (at Library/PackageCache/com.unity.collections@1.4.0/Unity.Collections/NativeParallelHashMap.cs:196)
Unity.Physics.CollisionWorld.Reset (System.Int32 numStaticBodies, System.Int32 numDynamicBodies) (at Library/PackageCache/com.unity.physics@0.51.1-preview.21/Unity.Physics/Collision/World/CollisionWorld.cs:53)
Unity.Physics.PhysicsWorld.Reset (System.Int32 numStaticBodies, System.Int32 numDynamicBodies, System.Int32 numJoints) (at Library/PackageCache/com.unity.physics@0.51.1-preview.21/Unity.Physics/Dynamics/World/PhysicsWorld.cs:41)

I'm assuming I have to wait for some physics job to complete, any ideas?