I have tested an instances of this bug. 1. A test area in above Environment is used. 3 Stone Blocks are used, One redstone torch is placed on top face on a single Stone Block and two stone blocks are placed on top of each other adjacent to the other Stone Block. On deletion of Stone Block under Redstone Torch the said torch floats as if connected to adjacent blocks but the model stays as if the torch is attched to a block beneath it.