Exception: A connection with systemId {...} has already been added.

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Hello,

Using my SmartComponent RsDrawGraphics, I cannot connect to controller after it is loaded. (Real or Virtual)
With RS 2019 it’s worked well, but with RS 2020.1.2 I can’t without message.
With RS 2020.2 this message appears:
RobotStudio .NET exception: A connection with systemId {204105E0-E849-48AD-BFB9-7A2274807590} has already been added.

Base exception: InvalidOperationException
A connection with systemId {204105E0-E849-48AD-BFB9-7A2274807590} has already been added.
at RobotStudio.Services.RobApi.RobHostServices.AddSharedConnection(RobControllerConnection conn)
at RobotStudio.Services.RobApi.RobApi1.RobControllerConnectionRobApi1.d__95.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at RobotStudio.Services.RobApi.RobControllerConnection.d__117.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at ABB.Robotics.RobotStudio.Controllers.ControllerManager.d__43.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at ABB.Robotics.RobotStudio.Controllers.ControllerManager.d__43.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at RobotStudio.UI.Controller.Commands.ConnectController.d__2.MoveNext()

The connection to controller in RsDrawGraphics occurs here.

In my dev machine, I have an older RS version due to new license system, so I can’t debug it.

Can someone tell me what I’ve done wrong?

PS: If I connect the real robot then load station, all works well.