Copy paste error in custom component

Hi guys,

I'm experiencing an error in my custom component which I couldnt the reason.

whenever I press Ctrl+C pbutton to copy the component in GH canvas this error occurs:

In debug mode,I could not  find the method which is to be called after ctrl+c or such event to toggle breakpoint and revise.

(after trying to copy the component constructor will be called but I 've no idea why the copy causes error )

Also same weird thing for clustering them happens.

Any hint or advise appreciated.

Best thanks,

Kaveh