bug or glicth etc

so this is what happened ... when I played for a new world in version 1.11.0.4 then I played with the seed 1856843094 .eed that I often use that is usually a lot of people. But why when I updated to version 1.11.0.5 for the new world using the seed earlier, why are the population so few and also the building there are 2 whether this is a bug. just that I can tell you thank you for the time