i'm not justifying jaekyung's actions but I partially understand why he's acting this way, jaekyung is currently working on training to reclaim his championship title and in his mind kd is a distraction because they both know that kd is leaving after the match and jaekyung can't confess feelings that he doesn't understand. in a way, him going back to his old self is his way of focusing rather than suffering with confusing feelings. like I said, it doesn't justify his actions and surely he'll apologize maybe next chapter or after the match but after suffering for a while.
Lolll so off topic but what if Jaekyung confesses on christmas