App freezes after pasting elements on area of previously removed diagram

Describe the Bug

Steps to Reproduce

1. Open the diagram in modeler Test_Diagram.txt
2. Copy the diagram.
3. Press Ctl + V (do not complete paste operation)
4. Press Clt + Z and remove/undo the diagram completely.
5. Now Paste the copied diagram exactly at the place of the diagram which was removed.

TypeError: Cannot read property 'childNodes' of undefined
    at W._createContainer (GraphicsFactory.js:110)
    at W.create (GraphicsFactory.js:136)
    at C._addElement (Canvas.js:548)
    at C.addShape (Canvas.js:570)
    at Np.execute (CreateShapeHandler.js:54)
    at CommandStack.js:404
    at r._atomicDo (CommandStack.js:367)
    at r._internalExecute (CommandStack.js:398)
    at r.execute (CommandStack.js:147)
    at Fl.dl.createShape (Modeling.js:290)

Expected Behavior

The diagram should have been pasted.

Environment

• OS: [MacOS 10.14.6 ]
• Camunda Modeler Version: [Version 3.3.0-alpha.3 (3.3.0-alpha.3.3814)]

[pinussilvestrus]

Fixed via https://github.com/bpmn-io/diagram-js/commit/6ebd3a571af1f1dccdb2a9d7d13fcd3941e4a702

Waiting for releasing for closing that.

[barmac]

Dragging operations should be canceled when user executes a command while dragging.