randomTickSpeed gamerule does not affect the speed of snowfall

The bug

When we set the randomTickSpeed gamerule to for example 100.0 and we are in a snow biome, the speed at which the snow falls is not increased.

How to reproduce

1. Create a new world with buffet modifiers, for example: Ice Pikes.
2. Run:

   /fill ~-15 ~-1 ~-15 ~15 ~-1 ~15 stone
   /weather rain 9999
   /gamerule randomTickSpeed 150 
   

   → The snow arrives at the same speed as if the randomTickSpeed gamerule was at 3