As near as I can tell, Chaos Mutants have 2 attacks. Their speed is supposed to be 100, my speed was 122 and there was nothing slowing me. In this encounter, in one turn, it escaped a web and hit me for the first time, then got in 7 more hits to kill me without me getting a turn.

Check it out:
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You focus your magical energies to release the spell.
The chaos mutant is hit by the magic missile!
The rat is hit by the magic missile!
[+67xp]
The rat is killed!
(more)
The writhing mass of primal chaos is hit by the magic missile!
The stone giant is hit by the magic missile!
The chaos mutant breaks free of the webs holding him!
The chaos mutant hits you for 8 damage.
You feel corrupted!
The chaos mutant hits you for 9 damage.
You feel corrupted!
You lose blood!
The chaos mutant hits you for 12 damage.
You feel corrupted!
The cyclops is struggling against a large web holding him!
The writhing mass of primal chaos seems to get stuck in some webs!
The ratling duelist is struggling against a large web holding him!
The chaos mutant hits you for 10 damage.
You feel corrupted!
The chaos mutant hits you for 8 damage.
(more)
You feel corrupted!
The chaos mutant hits you for 13 damage.
You feel corrupted!
The stone giant decides to fight to the death in a blind rage!
The stone giant is engulfed by some strange kind of purple radiation.
The stone giant seems to be corrupted.
The chaos mutant hits you for 10 damage.
You feel corrupted!
You feel corrupted.
[Press '\' to review your state of corruption.]
You suddenly lose a *lot* of weight.
The chaos mutant critically hits you for 79 damage.
You feel corrupted!
Your blood loss increases!
You lose blood!
You die...
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Anyway I'm wondering if this is normal. It seems like there is some sort of problem here.