Can confirm this bug is still present in pre-release 9 within Mushroom Island biomes.
The logs for 2016-06-21 are split into 2 files. I think this may have been due to a game crash?
2016-06-21-1.log: https://www.dropbox.com/s/ni6cvkzc0udg98y/2016-06-20-1.log?dl=0
2016-06-21-2.log: https://www.dropbox.com/s/lg62ppove2zisvo/2016-06-21-2.log?dl=0
The tl;dr version: lots of "Item entity ######## has no item" errors and "Can't keep up!" warnings.
A villager in a minecart was able to push me against the direction I was walking. He - on wheels - was able to overpower me. This makes no sense and breaks a lot of functionality. (16w07a)
Same issue on Ubuntu 18.04.6 LTS. Definitely not resolved...