Faerie Fire does not negate invisibility as it should

I cast faerie fire on some soraks but I could not target them. See screenshots below.

Solasta Faerie Fire Bug

The mouseover says (per the rules) the target cannot benefit from invisibility. But when I try to select them for an attack, it says I cannot see them, yet I know where the sorak is because I ran into it with another character and could not move to that square.