Lol yeah it can be assumed that Chris abruptly stopped being annoying late during the lock-in (he even emphatically apologized to wes over journals that night) (but the damage was obviously already done>

And Chris has probably been completely ignoring Rafael's frosty attitude because he doesn't know how to response to held grudges. But since he got the letter from his dad that's become a lot easier Bc he's been a lot quieter. (His father's accidentally helping him win a bet)