There is no rain naturally on my server (and also can't make it to rain)

Hello,

As the title says, I can’t make the weather to change to rain, when I /weather rain the sky keeps clear and nothing changes.

The weird part is /weather thunder kind of work, sometimes it activates, sometimes it doesn’t, and it only activates if I make it “rain” first, so this got me confused. And also /weather thunder only last for roughly 64 seconds (only tested- well while I was writing this the servers decides /weather rain should work, but only after I wrote /weather thunder with no apparent effect on the sky.

I have looked at the configs of all my plugins and mods but nothing appears to be modifying the weather, and again to activate both first need to be activated another stance of weather it is weird for me.

Looking forward to your replies!