How to reproduce:
1. Open any project with Cinemachine installed
2. Add a "Cinemachine Camera" Component to a GameObject
3. In the Component, on the right of the field "Output Channel" click the gear icon and create a channel names Asset
4. Enter PlayMode
5. In the Asset, fill the list with new channels
6. Exit PlayMode and observe the Console

Reproducible with: 3.0.0-pre.7

Error message:
"NullReferenceException: SerializedObject of SerializedProperty has been Disposed.
UnityEditor.SerializedProperty.get_intValue () (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.Bindings.ListViewSerializedObjectBinding.UnbindListViewItem (UnityEngine.UIElements.VisualElement ve, System.Int32 index) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEngine.UIElements.ListViewController.UnbindItem (UnityEngine.UIElements.VisualElement element, System.Int32 index) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.CollectionViewController.InvokeUnbindItem (UnityEngine.UIElements.ReusableCollectionItem reusableItem, System.Int32 index) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.VerticalVirtualizationController`1[T].ReleaseItem (System.Int32 activeItemsIndex) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.DynamicHeightVirtualizationController`1[T].ReleaseItem (System.Int32 activeItemsIndex) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.VerticalVirtualizationController`1[T].Refresh (System.Boolean rebuild) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.DynamicHeightVirtualizationController`1[T].Refresh (System.Boolean rebuild) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.BaseVerticalCollectionView.RefreshItems () (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.CollectionViewController.set_itemsSource (System.Collections.IList value) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.BaseVerticalCollectionView.set_itemsSource (System.Collections.IList value) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEditor.UIElements.Bindings.ListViewSerializedObjectBinding.ClearListView () (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.ListViewSerializedObjectBinding.Release () (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.RemoveBinding (UnityEngine.UIElements.IBindable bindable, System.Boolean forceRemove) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.Unbind (UnityEngine.UIElements.VisualElement element) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.DefaultSerializedObjectBindingImplementation.UnbindTree (UnityEngine.UIElements.VisualElement element) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.DefaultSerializedObjectBindingImplementation.Unbind (UnityEngine.UIElements.VisualElement element) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.BindingExtensions.Unbind (UnityEngine.UIElements.VisualElement element) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.PropertyField.Reset (UnityEditor.SerializedProperty newProperty) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.PropertyField.Reset (UnityEditor.UIElements.SerializedPropertyBindEvent evt) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.PropertyField.ExecuteDefaultActionAtTarget (UnityEngine.UIElements.EventBase evt) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEvent (UnityEngine.UIElements.EventBase evt) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtCurrentTargetAndPhase (UnityEngine.UIElements.EventBase evt) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtTargetPhase (UnityEngine.UIElements.EventBase evt) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtTargetAndDefaultPhase (UnityEngine.UIElements.EventBase evt) (at <15230963ad214ef9972d854a56d0846d>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.SendBindingEvent[TEventType] (TEventType evt, UnityEngine.UIElements.VisualElement target) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.BindPropertyRelative (UnityEngine.UIElements.IBindable field, UnityEditor.SerializedProperty parentProperty) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.BindTree (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedProperty parentProperty) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.BindTree (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedProperty parentProperty) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.BindTree (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedProperty parentProperty) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.ContinueBinding (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedProperty parentProperty) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.Bind (UnityEngine.UIElements.VisualElement element) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.Bindings.DefaultSerializedObjectBindingImplementation.Bind (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedObject obj) (at <64210cec33d842e79cef3cc945cf345e>:0)
UnityEditor.UIElements.BindingExtensions.Bind (UnityEngine.UIElements.VisualElement element, UnityEditor.SerializedObject obj) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.InspectorElement.SetEditor (UnityEditor.Editor value) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.UIElements.EditorElement.Reinit (System.Int32 editorIndex) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.PropertyEditor.ProcessEditorElementsToRebuild (UnityEditor.Editor[] editors) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.PropertyEditor.DrawEditors (UnityEditor.Editor[] editors) (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.PropertyEditor.RebuildContentsContainers () (at <d6d088ded9754d9790b4a803014a22a0>:0)
UnityEditor.InspectorWindow.RedrawFromNative () (at <d6d088ded9754d9790b4a803014a22a0>:0)"