Command block, Open to Lan.

_+What I expected to happen was...:_+
I think I must have access to command blocks and I must have sounds of them.
_+What actually happened was...:_+
You can't open the interface of the command block and you don't have sounds when you place and break them.

_+Steps to Reproduce:_+
_1._ Open to lan with allow cheat on off.
_2._ Place command blocks.

_+Attachment:_+
Video: https://www.youtube.com/watch?v=30Pkpi_qHtI