Mirrored ToDo items no longer work properly in shared lists

Futher info.
This seems to have something to do with having mirrored items in different locations.

The attached video demonstrates the bug:

  • create ‘EggsTest’ todo item
  • create mirror of this bullet
  • paste mirror underneath existing ‘EggsTest’
  • checkbox mirror works - as expected
  • Move mirrored item into different list
  • Mirroring of checkbox breaks - checkbox element is not updated accordingly

Note if I return the mirrored item to its original location - it works again.