Depends on the agent. While the player just tells his agent to keep every door open just in case, the agent can pursue his own agenda. Don't forget that the agent is after a big paycheck. He doesn't get anything, if Frenkie just stays on the current contract. But he gets his 10%+ commission with a transfer. So no harm in encouraging a big club to stay on it with the hope the player might give in at some point.
From my feeling, Dursun is exactly that kind of type. Refuses to sit down with Alemany, rages and insults reporters at the airport why they are filming him, while everyone knows how spain reporters work. Pressures barca to give Braithwaite a letter of freedom and pay him the remaining years of the contract, so he can get a double paycheck. In my opinion, this guy is controlled by feelings (proud, angry) and that isn't professional. That's why I wouldn't be surprised if he acted like I said.