Errors on the PS4 minecraft aplicattion

Good evening,
Since the release of the Nether Update I have overcommed a lot of bugs on my world. Such as losing mobs because of errors on the minecraft apliccation on PS4, or not achieving the new thropies that came withing the new update. I have tried to uninstalled the game several times but this do not work. Could you help me fix this bugs on PS4.
Thank you for your attention.