It maybe happened yesterday in a server whene i claim a zone of 100 block, the server was offline for about a minute and then the server restart without the structure of all player but i have the same inventory and skills
On my world (server same computer as client; Windows 10 64-bit, Nvidia GeForce 980 Ti water cooled, intel i7 3.3 GHz 6 core water cooled) I don't have it exactly like this. When they move it seems to move properly. However, they often just stand still and run in place forever.
In one case I had just dug up from the ground as a rabbit was running and somehow breaking the block under it caused the rabbit to get "stuck" and it ran in place. I tried digging blocks out around, putting blocks back, etc. It just ran for days until it eventually died. I called it "Bugs Bunny" (pun intended) since it was right outside my door step to greet me each day.
If you post bugs could you guys please be so nice and post 1 bug per post and not 2 or 10 or 100 ? =P it makes it easier to have an overview over all bugs and discussions if each bug goes in its own post ! =)