Well, probably this is because of the new world generation of 21w06a, but, me and my friend want to test the lightning rod, so we put the /weather thunder command, and, has we was in a mountain, it start falling snow, so we go to a place that rains and it was not raining, so we put a lightning rod and nothing happen's which is weird because the lightning rod doesn't stop  lightnings just atracted them, but when we move a little, it start to rain but just in like 8 blocks, and the lightning rod start to work on that place, just that place that rained, even if the sky was like when is thunder. Probably a weather bug due to the new generations. Oh and sorry i don't have a print but it's exactly what i said