Lily pads can generate on land

The bug

I was just doing survival, and i found some lily pads that generated on the ground.

How to reproduce

Seed: 3450338330123376815
Coordinates: /tp @s -8466.06 65.64 -2701.96 -45.74 62.65
/tp @s -12163.97 65.37 -3930.73 -229.56 54.14

Note: This doesn't happen all the time.