Shadow Devices causes crash

[Remixful]

2022-11-12 03:09:18.3133 FATAL Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at HidWizards.UCR.Core.Models.Subscription.PluginSubscription..ctor(Mapping mapping, Plugin plugin, Guid subscriptionStateGuid, List`1 outputDeviceConfigurations) in D:\Projects\UCR\UCR.Core\Models\Subscription\PluginSubscription.cs:line 13
   at HidWizards.UCR.Core.Models.Subscription.MappingSubscription..ctor(Profile profile, Mapping mapping, Guid subscriptionStateGuid, List`1 subscriptionOutputDeviceConfigurations) in D:\Projects\UCR\UCR.Core\Models\Subscription\MappingSubscription.cs:line 27
   at HidWizards.UCR.Core.Models.Subscription.SubscriptionState.CloneMappingSubscription(Profile profile, MappingSubscription mappingSubscription, List`1 profileOutputDevices, Int32 shadowClones) in D:\Projects\UCR\UCR.Core\Models\Subscription\SubscriptionState.cs:line 67
   at HidWizards.UCR.Core.Models.Subscription.SubscriptionState.AddShadowMappings(Profile profile, List`1 profileMappings, List`1 profileOutputDevices) in D:\Projects\UCR\UCR.Core\Models\Subscription\SubscriptionState.cs:line 56
   at HidWizards.UCR.Core.Models.Subscription.SubscriptionState.AddMappings(Profile profile, List`1 profileOutputDevices) in D:\Projects\UCR\UCR.Core\Models\Subscription\SubscriptionState.cs:line 43
   at HidWizards.UCR.Core.Managers.SubscriptionsManager.PopulateSubscriptionStateForProfile(SubscriptionState state, Profile profile) in D:\Projects\UCR\UCR.Core\Managers\SubscriptionsManager.cs:line 163
   at HidWizards.UCR.Core.Managers.SubscriptionsManager.ActivateProfile(Profile profile, Boolean refreshDevices) in D:\Projects\UCR\UCR.Core\Managers\SubscriptionsManager.cs:line 53
   at HidWizards.UCR.Views.MainWindow.ActivateProfile(Object sender, RoutedEventArgs e)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at HidWizards.UCR.App.Main()

Don't know what's going on but I was really looking forward to using this feature...