This is a regrettable accident...
Although Hei Fan did not specifically ask the knight to check on Qiu, it wasn't because he didn't care or had forgotten about the other player. He knew that Qiu was a player, just like himself. Thus, he didn't think too much of it. After all, they were both playing the game, and there was no reason to expect the other to accompany oneself in any specific way. If they wanted to communicate, they could always exchange information via friend messages. Therefore, with the premise of "though far apart, friends are close at heart," there naturally was no need for the kind of comprehensive interaction one might have with an NPC.