Torches placed in previous versions of Preview don't cast light rays

Open up a pre-existing Minecraft Preview world that was using the Render Dragon Features for Creators. None of the torches or lanterns emit light rays and cast shadows on the surrounding area anymore. Break a torch and replace it and it will behave correctly again casting rays and shadows. The first image shows torches placed previous to the update. The second image shows a torch (right) that has been broken and then placed back down again and now casts light and shadows on the surrounding blocks.