Errors after update to 12.9.0.0

Team,
Since update of RDM to 12.9.0.0 I've been seeing almost daily errors (seen below) initial update wiped all of the listed favs and search bar was not working however it was fixed with 12.9.1.0 however error below is still an issue for me with current version 12.9.2.0. Any ideas as to what I can do to correct?
Felix
System.NullReferenceException: Object reference not set to an instance of an object.
at DevExpress.XtraBars.Docking2010.Views.BaseView.DocumentClosedContextKey..ctor(BaseView view, BaseDocument document)
at DevExpress.XtraBars.Docking2010.Views.BaseView.DocumentClosedContext.IsDocumentClosing(BaseView view, BaseDocument document)
at DevExpress.XtraBars.Docking2010.Views.BaseView.IsDocumentClosing(BaseDocument document)
at DevExpress.XtraBars.Docking2010.ContainerControlManagementStrategy.CheckFocus(Int32 Msg, BaseView view, Control control, IntPtr wParam)
at DevExpress.XtraBars.Docking2010.DocumentManager.CheckFocus(Int32 msg, BaseView view, Control control, IntPtr wParam)
at DevExpress.XtraBars.Docking2010.Views.BaseDocumentCollection.CheckFocus(Int32 msg, Control control, IntPtr wParam)
at DevExpress.XtraBars.Docking2010.Views.BaseDocumentCollection.PostFilterMessageCore(Int32 Msg, Control wnd, IntPtr HWnd, IntPtr WParam, IntPtr LParam)
at DevExpress.XtraBars.Docking2010.Views.BaseDocumentCollection.DevExpress.Utils.Win.Hook.IHookController.InternalPostFilterMessage(Int32 Msg, Control wnd, IntPtr HWnd, IntPtr WParam, IntPtr LParam)
at DevExpress.Utils.Win.Hook.HookManager.InternalPostFilterMessage(HookInfo hInfo, Int32 Msg, Control wnd, IntPtr HWnd, IntPtr WParam, IntPtr LParam)
at DevExpress.Utils.Win.Hook.HookManager.WndHook(Int32 ncode, IntPtr wParam, IntPtr lParam)