sometimes when i start the game the character is holding the wrong item in his hands. (the item he is holding appears to be the last thing used in game (provided it can go in a hotbar slot)
if you had a weapon he used to (pre 0.57) hold that.
I'm not sure if this is intentional and you guys simply have not done the pose animations for different items yet or if its a bug.
screenshot of my guy holding a compass with a gun pose when i have an axe and mosin on my back