Mobs Turing Invisible In Minecraft 18w47a

So I Was In My Village, Minding My Own Business Until I Saw A Vindicator And Some Pillagers! So I Tried Killing Them, But A Mean Vindicator Killed Me With Its Handy Dandy Iron Axe. So I Go Back Where The Pillagers And Vindicator Was, But They Were Gone. I Could Hear Them And The Chat Bar Said That I Was Slain By A Vindicator, But It Was Nowhere To Be Found. This Also Happened Yesterday When I Went To A Woodland Mansion. Their Were Explosions That Where From Creepers That Weren't There