Trade kills are counted differently depending on who dies first.
Video: https://www.youtube.com/watch?v=Ccu0SlrMtoI Both clips are from the same match, from consecutive rounds. (Note for clarification: Kill 1 in Situation 1 happened off-screen a couple seconds earlier.)
First situation: I die first, opponent dies last: My kill is not added to the score, my death is added to the score. = Not ideal
Second situation: My opponent dies first, I die last. My kill is added to the score, my death is added to the score. = How it should work
I am not sure how easy fixable it is (My uneducated guess is, that everything after death is ignored.), and I am aware that it is at the lower end of problems, but it still would be nice if that problem could be tackled.
(Not so unimportant) Sidenote: A ping-kick will not get rid of the problem, trade kills will still happen, but both of those situations in the video are definitely related to ping differences. While I personally would consider a ping up to 125 in a casual environment as okay-ish, anything above does not really work, especially pings in the 200 range are unacceptable.