You are indeed right about that. But that would mean that Haniyeh is their only contact person which also seems doubtable.
In any case since the article contains this line
“It is also possible that their positions are not so far apart and the talks are derailing for some other reason. These are very sensitive negotiations, and it doesn’t take much for someone to throw in a wrench if they want to strut about for some personal motivation we don’t know about.”
It seems like we’re basically just gossiping without any real evidence. Which makes the headline pure clickbait.