When jumping down from the spawn in Snowball Mayhem, occasionally the player’s skills will be randomly changed to one of the other two skill sets. This effectively removes that player from the initial rush for the first gift. It happens often enough that you should be able to reproduce it relatively easily, but I’m not sure what causes it.
I have noticed that if I put one of my skills on cooldown before jumping down, it prevents the skill set from changing.
Hopefully there’s a way to fix this. It was an issue during last year’s Wintersday, too.