World taking much longer time to load than the previous version

As soon I downloaded minecraft pocket edition latest version i.e. V 1.16.100.04 And clicked on my world to play it, It's take wayyyy much longer time to load/generate than the previous version taht is V 1.16.40.02 ,I don't know why that's happening,But that's so annoying.
I am attaching videos of both versions down below,Plz check it out and fix it Mojang
Both video is fast forwarded as I can't upload videos more than 10 mb...
1st video - V 1.16.100.04
2nd video - V 1.16.40.02