Ignis doesn't know how to bring this up with Noctis but yes, he needs to talk about it with him. To warn him if he doesn't know or discuss if he does. Ignis won't calm down until he knows that there is nothing he can do. He'll turn the sky upside down if he has to.

"I... don't know what we can do," Ignis says with heavy sighs, his cheeks still stained with tears as he leans back on the couch. "But that doesn't mean I won't try to do something. I can't just accept this while sitting down and doing nothing."

What was the point of getting a vision of future if not to stop it?

"The eyesight you mentioned I lost- I'd give it million times again if it meant that it will change something." Although, he knows that he's insignificant in the grand scheme of things.