message: fix: stack child unmounting issue
diff: @@ -73,7 +73,7 @@ export default (
  childrenArray = childrenArray.map((child: any, index: number) => {
  return (
  - <React.Fragment key={`spaced-child-${index}`}>
  + <React.Fragment key={child.key ?? `spaced-child-${index}`}>
  {child}
  {index < childrenArray.length - 1 && divider}
  </React.Fragment>
  @@ -85,7 +85,7 @@ export default (
  };
  childrenArray = childrenArray.map((child: any, index: number) => {
  return (
  - <React.Fragment key={`spaced-child-${index}`}>
  + <React.Fragment key={child.key ?? `spaced-child-${index}`}>
  {child}
  {index < childrenArray.length - 1 && <Box {...spacingProp} />}
  </React.Fragment>
  