it makes perfect sense
I re-watched the fight club episode of Guardian (ep. 18), and 1) it was great; 2) see #1.
Also, in the scene where Lin Jing is tracking things (I love that they explain so many things with ‘oh, Lin Jing invented something’ and then when they need to not be able to do that thing it’s all ‘huh, guess that invention’s not working today, weird’), I got distracted watching Da Qing completely zone out. So I watched it again, and here is my theory:
IT’S THE RED DOT. Lin Jing’s tracking program shows Fire as a glowing red dot moving across the screen. And there is no more surefire way to distract a cat than to move a glowing red dot around in front of them.
In conclusion: cats are great.