Whenever a storm goes over water, you can see water behind storms, this wasn't happening on the 1.7.10 version.
This is on the 1.12.2 version, you can see water behind storms which is very annoying, and needs to be fixed in the next version

This is on the 1.7.10 version and you can't see water behind storms as storms were less glitched back then, but storms would die at high stages if you set the higher stages to a lower level on the config which increases the amount of high stage tornadoes/hurricanes.

oh yeah! i was gonna say something about this bug too

also back on the 1.10.2 version water couldn't be seen through storms back when sandstorms were added

also I found why this was happening, it was the useEntityRenderHookForShaders line in the coroutil general config, it was set to true by default which is why this was happening, to stop it from happening you need to set it to false