Everything is buggy af about Druid

Hey!
There are a lot of bugs like I said but I'll mention just this one, because this one affected me more than others.
So the problem is with "Lunar Assault" Skill and "Embitter" support gem, it doesn't affect the skill as it should've.
I've "Unquenchable Iron" (18% damage gained as lightning) and "Molten Claw" (8% gained as fire) allocated.

When I put this support gem it should convert these to cold damage and "dps" should go up but it doesn't.
Like I said I've unquenchable iron allocated so this skill should have a bit of lightning damage right? But when I take out "Embitter" there is no lightning damage in the advanced info section, let's say this skill can only deal cold damage there is no indicator for that as well, let's say idk about it but there is a hidden mechanic preventing other damage types to affect, the problem is advanced info section shows a bit fire damage which comes from (I suspect) my ring, which has added fire damage.

I think there is a pretty BIG problem here. Problem is not the passives, they work on my "shred" skill I can see that, it's "Lunar Assault"
I checked the other cold skills as well, they all have cold, fire and lightning damages.