Entities 0.5.1 billboard issue

[SomePlayer]

Using Unity 2019.3.0f6 and Entities 0.5.1

Editor will spam this error upon exiting playmode, if BillboardcameraProxy is used.
a work around is to disable all (of the scripts added by BillcamProxy) but GameObjectEntity after adding BillboardcameraProxy to the main camera.

NullReferenceException: Object reference not set to an instance of an object Unity.Entities.EntityQuery.CreateArchetypeChunkArray (Unity.Collections.Allocator allocator) (at Library/PackageCache/com.unity.entities@0.5.1-preview.11/Unity.Entities/Iterators/EntityQuery.cs:574) Unity.Entities.Editor.EntityListView.BuildRows (UnityEditor.IMGUI.Controls.TreeViewItem root) (at Library/PackageCache/com.unity.entities@0.5.1-preview.11/Unity.Entities.Editor/EntityDebugger/EntityListView.cs:142) UnityEditor.IMGUI.Controls.TreeView+TreeViewControlDataSource.FetchData () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.IMGUI.Controls.TreeViewDataSource.ReloadData () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.IMGUI.Controls.TreeView+TreeViewControlDataSource.ReloadData () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.IMGUI.Controls.TreeViewController.ReloadData () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.IMGUI.Controls.TreeView.Reload () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) Unity.Entities.Editor.EntityListView.ReloadIfNecessary () (at Library/PackageCache/com.unity.entities@0.5.1-preview.11/Unity.Entities.Editor/EntityDebugger/EntityListView.cs:105) Unity.Entities.Editor.EntityDebugger.OnGUI () (at Library/PackageCache/com.unity.entities@0.5.1-preview.11/Unity.Entities.Editor/EntityDebugger/EntityDebugger.cs:523) System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <437ba245d8404784b9fbab9b439ac908>:0) Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation. System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <437ba245d8404784b9fbab9b439ac908>:0) System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <437ba245d8404784b9fbab9b439ac908>:0) UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.HostView.Invoke (System.String methodName) (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect) (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEditor.DockArea.OldOnGUI () (at <6f28216fea9f453abf2e05b770ed3ee4>:0) UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Boolean canAffectFocus) (at <a6a3aac9b47844afbb8dcc407683ae01>:0) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)