Command /weather doesn't work

Hello,

When I wanted to test the lightning rod on my Minecraft world, I just noticed that when I was executing the command "/weather thunder" or other related weather commands, it wasn't working. I checked the biome where I was, I checked the sounds if it was the problem, I also checked if I haven't put a ressource pack, but nope.

Video: https://youtu.be/_zG473s_Y9U