when i opened the world the plants and flowers is generated in the air or in the sand 

How to reproduce

yo start your world in the seed -5483589859313436345

before you need move arround of the spawn and you can wach a lake with plants floating

or can go using the commands:

for the first image

/tp @s -93 68 22

for the second image

/tp @s -32 63 131

for the third image:

/tp @s -42 70 49