Being the Lin Kuai Grandmaster, he had the responsibility in which requires professionalism. But, when he is not the Grandmaster, and simply Bi Han- he will not refuse gossip. It is simply just a way of humans, it is in their nature to want to do so (although he does act as if he is above such things, he scolds his brothers if he even hears a murmur of it). So in secret, the two of you share rumors- whispering and smiling over the misfortunes of others.
Whether it be whilst on a walk or sparring, or perhaps over tea, he will never turn down speaking about others. Moral of the story? He likes to gossip, or "spill the tea" as hes heard Johnny -and then Smoke- put it (he laughed in Smoke's face when he tried using said term, the second hand embarrassment was strong).
"Please, you're telling me that Zaterran immediately stopped mourning?" He'd scoff out, he stares at his nails whilst you tell him about Syzoth. He sits calmly at the other end of the table, whilst you look through Madam Bo's menu ((Hes not one to talk about mourning ngl😒)). He specifically chose a table farther back, to avoid seeing the others. You had teased him for being paranoid, and all he did was stare at you through the side of his eye.