Bug InvalidOperationException when cloning a CollisionWorld

I'm upgrading to the 1.0 version and I clone the collision world so I can hand it off to a rather long running job that uses it for a bunch of things. I'm trying to do this with the following inside a SystemBase system...

Code (CSharp):

1. RefRW<PhysicsWorldSingleton> physicsWorldSingleton = SystemAPI.GetSingletonRW<PhysicsWorldSingleton>();
2.             _clonedWorld = physicsWorldSingleton.ValueRW.PhysicsWorld.CollisionWorld.Clone();

But it always throws this error...
InvalidOperationException: The previously scheduled job BroadphaserepareStaticBodyDataJob writes to the UNKNOWN_OBJECT_TYPE PrepareStaticBodyDataJob.FiltersOut. You must call JobHandle.Complete() on the job BroadphaserepareStaticBodyDataJob, before you can read from the UNKNOWN_OBJECT_TYPE safely.
Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrowNoEarlyOut (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) (at <bdd20210bb844b2e88e1149ea99da5ef>:0)
Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrow (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) (at <bdd20210bb844b2e88e1149ea99da5ef>:0)
Unity.Collections.NativeArray`1[T]..ctor (Unity.Collections.NativeArray`1[T] array, Unity.Collections.Allocator allocator) (at <bdd20210bb844b2e88e1149ea99da5ef>:0)
Unity.Physics.Broadphase+Tree.Clone () (at Library/PackageCache/com.unity.physics@1.0.0-pre.15/Unity.Physics/Collision/World/Broadphase.cs:443)
Unity.Physics.Broadphase.Clone () (at Library/PackageCache/com.unity.physics@1.0.0-pre.15/Unity.Physics/Collision/World/Broadphase.cs:58)
Unity.Physics.CollisionWorld.Clone () (at Library/PackageCache/com.unity.physics@1.0.0-pre.15/Unity.Physics/Collision/World/CollisionWorld.cs:118)
StratheonMin.Client.TypeSystem.Plans.ECS.Systems.ConnectionValidatorSystem.LaunchValidationJob () (at Assets/Assemblies/StratheonMin.Client/TypeSystem/Plans/ECS/Systems/ConnectionValidatorSystem.cs:112)
StratheonMin.Client.TypeSystem.Plans.ECS.Systems.ConnectionValidatorSystem.InternalOnUpdate (Unity.Jobs.JobHandle inputDeps) (at Assets/Assemblies/StratheonMin.Client/TypeSystem/Plans/ECS/Systems/ConnectionValidatorSystem.cs:83)
StratheonMin.Client.PlanBuilder.ECS.Systems.ClientConnectionValidatorSystem.InternalOnUpdate (Unity.Jobs.JobHandle inputDeps) (at Assets/Assemblies/StratheonMin.Client/PlanBuilder/ECS/Systems/ClientConnectionValidatorSystem.cs:35)
StratheonMin.Client.TypeSystem.Plans.ECS.Systems.BasePlanSystem.CallInternalOnOpdate () (at Assets/Assemblies/StratheonMin.Client/TypeSystem/Plans/ECS/Systems/BasePlanSystem.cs:33)
StratheonMin.Client.TypeSystem.Plans.ECS.Systems.BasePlanSystem.OnUpdate () (at Assets/Assemblies/StratheonMin.Client/TypeSystem/Plans/ECS/Systems/BasePlanSystem.cs:28)
Unity.Entities.SystemBase.Update () (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/SystemBase.cs:428)
Unity.Entities.ComponentSystemGroup.UpdateAllSystems () (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ComponentSystemGroup.cs:670)
UnityEngine.Debug:LogException(Exception)
Unity.Debug:LogException(Exception) (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/Stubs/Unity/Debug.cs:19)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ComponentSystemGroup.cs:675)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ComponentSystemGroup.cs:628)
Unity.Entities.SystemBase:Update() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/SystemBase.cs:416)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ComponentSystemGroup.cs:670)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ComponentSystemGroup.cs:628)
Unity.Entities.SystemBase:Update() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/SystemBase.cs:416)
Unity.Entities.DummyDelegateWrapper:TriggerUpdate() (at Library/PackageCache/com.unity.entities@1.0.0-pre.15/Unity.Entities/ScriptBehaviourUpdateOrder.cs:526)


Am I doing this wrong? I used to use the call to RegisterPhysicsSystemsReadOnly() in the system startup in the previous version but the docs for the current version say that's been removed in favor of the new GetSingletonRW call.