When entering a buttons block-space you will see that type of buttons block surround you like your inside it. You don't take damage its just a visual bug that can get annoying if you are walking by buttons.
How to re-create, walk inside of a button at head level. Stone or Wood, both are effected.
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Duplicate of MCPE-14544 – If you have not, please use the search function in the future, to see if your bug has already been submitted.
Duplicate of MCPE-14544 – If you have not, please use the search function in the future, to see if your bug has already been submitted.

This is not a duplicate as i do not suffocate, making this bug extremely different.
Also it seems that the beta tests do not work if these bugs exist in beta and then official release. I would rather wait another 2 weeks than have all these annoying bugs espicialy the teleporting bug.