No livro em que o filme se baseia, diz:
Logging out of your OASIS account while you were engaged in combat was the same thing as committing suicide. During the log-out sequence, your avatar froze in place for sixty seconds, during which time you were totally defenseless and susceptible to attack. The log-out sequence was designed this way to prevent avatars from using it as an easy way to escape a fight. You had to stand your ground or retreat to a safe location before you could log out.
Suponho que o logout imediato mostrado no filme só estava disponível se você não estivesse envolvido em combate PVP.