Cave of the Nadir bug? minor spoliers

Sorry if this is in the wrong section. I’m currently searching for the cave and i have a rival, i thought that rival was only February but i has saw this ;A chance to hinder Dr Orthos. Any ideas?

Do you have the “Hearing Rumours of Orthos’ Progress” quality? It’s been a while, so I forget if the option shows up regardless of whether Orthos is an actual rival or not for your particular expedition.