Scoreboard death timers broken

I was in a game with 2 other friends earlier, and we killed the enemy xerath, corki, and bard, and for some reason in the scoreboard it only had the death timer for xerath, and it didn't even say that the corki and bard were dead. On one of my friend's scoreboard, it said that none of them were dead, and on my other friend's scoreboard it said that all three of them were dead.

No screenshots atm. :p