Invisible blocks and odd chunk generation

For some odd reason whenever I go into a chunk that was loaded recently some blocks appear invisible and I glitch when trying to walk through, say a half tree. When I reload the world the blocks reappear. Most of the time it has an odd hollow square type shape to it

Not sure if this occurs only in new chunks in a world created in an older version or if it occurs when a chunk is loaded (and the player did not spawn near it

I have uploaded 2 pictures one with the odd "invisible blocks" and one when the world was reloaded just afterwards