actions inside Multi Action fail

When an action is inside a Multi Action, which is provided by elgato as built-in defaults, it fails to run or even register properly.

In my case, it was Mackie Control action.

Steps to reproduce:

1. Create a Multi Action from Stream Deck category
   
2. Double click into it and add Mackie Control action inside
   
3. Check the log file
   

The log file writes the following at the moment of adding the action,

Code:

2021-08-20 00:53:07.436 Error       0.00ms MCU              Constructor                   [F17A5B2A490A09690AC55C14674C1035:Exception:System.NullReferenceException: Object reference not set to an instance of an object.
   at StreamDeck_Midi.PluginActionMCU..ctor(SDConnection connection, InitialPayload payload) in C:\Projects\StreamDeck-Midi - Core\StreamDeck-Midi\Actions\PluginActionMCU.cs:line 347]

However, on the stream deck app, it seems to be added. And after a while, new error is added,

Code:

2021-08-20 00:53:28.983 Fatal Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at StreamDeck_Midi.PluginActionMCU.DetachFromCommand(MCUButtonCommand selectedCommand) in C:\Projects\StreamDeck-Midi - Core\StreamDeck-Midi\Actions\PluginActionMCU.cs:line 2705
   at StreamDeck_Midi.PluginActionMCU.Dispose() in C:\Projects\StreamDeck-Midi - Core\StreamDeck-Midi\Actions\PluginActionMCU.cs:line 1366
   at BarRaider.SdTools.PluginBase.Destroy() in C:\Projects\StreamDeck-Midi - Core\streamdeck-tools-master 2.9.0\barraider-sdtools\Tools\PluginBase.cs:line 58
   at BarRaider.SdTools.PluginContainer.Connection_OnWillDisappear(Object sender, StreamDeckEventReceivedEventArgs`1 e) in C:\Projects\StreamDeck-Midi - Core\streamdeck-tools-master 2.9.0\barraider-sdtools\Backend\PluginContainer.cs:line 169
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__139_1(Object state)
   at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()


Ouch :-(

Thanks, I'll have a look at it right away.