I think Soccer Room is a PVP zone ?
most rooms in Cube are pvp zoned, So thats possible. I don't do cube as much but if I recall there is a mob that is supposed to attack you .-. Sometimes getting one shotted usually glitches that chat and doesn't show you what killed you. (this happens to me mostly when I lag) I also think along time ago on normal servers the portal would kill people. This was along time ago though..
portal would kill people
Its portal.. i do cube every day.. its not glitch.. when u near portal a bit over a portals border u die..