Hello!
Maybe it's an already known issue, but the fireflies don't fly, and stay only on the ground. Could be a lot more immersive to have them flying around in groups, would be awesome!
Here is what happens in the current version:

This is a problem with AI optimization mods, nothing I can do about it

Do you have a mod list I can look at? From my experience this is probably an unintended interaction between AI/optimization mods.