They use wording -- just like this article does -- like "X happens as Y also happens".
The keyword being "as" and not "because" or "due to".
It implies causality, by coupling both in the same title, without technically linking the two.
E.g. "Stocks fall as rate increase looms"
They're basically just saying two things happened at the same time, or one after the other, but one didn't necessarily cause the other.
IOW, they know they can't link the two -- i.e. they can't user words like "because" or "due to" -- but they also know that by coupling them in the same headline, readers will still infer causality.