There is a bug where if you are using wsad keys to move around, occasionally, in isometric camera angle, they keys will stop working correctly, and no matter which one you press, the character will walk in one direction. After pressing keys and left clicking with the mouse for a while, this usually goes away.
Also, not sure if this is a bug or a just an issue, but when left clicking to walk somewhere, and then while walking, pressing down the wsad keys to continue moving, the character will always stop at the location of the original click, making you have to press wsad again to resume walking. If this is not a bug, it is nevertheless very annoying.