Like the title said, when i rotate/move the bone and sprite, after i release the mouse button, it immediately snap back to previous position, similar to when trying to rotate the IK anchored bone. i can't seems to rotate and reposition any bone and sprite on a particular frame. it only appear sometime, and the way to fixing it is to save and quit, then reopen, and everything is back to normal(or just by deleting all the key on that frame). Didn't change any of the setting tho, it just happen sometime.