Stopping Minecart and long waiting for chunks

Dear Mojang,

I am building a City in Minecraft on my playstation in creative mode on super flat. 

But when I or my siblings use the mine cart, it begins to stop often, because of the loading chunks. That's a huge problem that I´m confronting for years. Back when Minecraft playstation was powered by 4J Studios, there was not such a problem. 

 Even when I am just flying threw my world, I have to stop, because of the long waiting time for the loading of the chunks. 

 

I also tried using smaller render distance, but it doesn't seem to help. 

 

So pls fix that Mojang.  I love Minecraft