issues with spawn eggs

issues with some spawn eggs :

horses, parrots, llamas, rabbits, and sheep keep the same color
(white for horses, brown for rabbits, beige for llamas, white for sheep and red, yellow and blue for parrots)

slimes and cubes of magma that have appeared using spawn eggs are always tiny

and skeletons and wither skeletons do not have their weapons (bow or stone sword)