breaking bedrock

Ability to break bedrock

the bedrock to do nothing:
nothing
the bedrock broke:
i placed a chest in the top of the nether and then placed a wither skull from the side of it, destroying a bedrock block
Steps to Reproduce:
1. place a chest next to a bedrock block
2. get a Witherskull
3. Place the Witherskull on the side of the chest touching the bedrock while shifting Thus destroying the bedrock