Hayoxi's Fulmination cannot support curses, but supports spells ?!?!?

This lineage support seems to be totally broken.

It cannot be equipped on curse skills and it says "Supports Curse Skills" as a first line on it....

For some absurd reason I seem to be able to support spell skills with it, which of course does nothing?

You already have Cursed Ground type gem socketed, pull it out.

This is not cursed ground, this is "Ritualistic Curse" - https://poe2db.tw/us/Ritualistic_Curse. The empty slot used to hold the cursed ground.

I already sold the gem, as it doesn't work, but I was not able to slot it in, even if I have no support gems in the curse.

And still - I am able to socket the support gem in spells that are not curses - it seems like GGG might just have garbled a tag or just reversed accidentally a boolean check for this support specifically and made it target "Spell" & NOT "Curse" instead of "Spell" & "Curse".

(As for why they would have spell in the check involved at all - my theory is that due to marks not being spells but still being curses, they wanted to exclude this from affecting them)

Welp, I mixed up the icons.

This kind of bug is individual and from what I've read can be fixed by tinkering with skill menu and weapon swaping (or buying another gem). But I mostly skip such "can't socket" reports, so I don't know much about it. It's not related to Hayoxi's Fulmination specifically. It supports curses fine.

Spells supporting is another issue.