Drag of signal from from middle of the list to end ends with error.

[Nic30]

d3-wave.js:398 Uncaught TypeError: Cannot read properties of undefined (reading 'children')
    at SignalLabelManipulation.dragEnded (d3-wave.js:398:42)
    at SVGGElement.dragEnd (d3-wave.js:426:21)
    at Ct.call (d3.min.js:2:15446)
    at Object.e (d3.min.js:2:227407)
    at g (d3.min.js:2:226577)
    at d3.min.js:2:20615