Unusual behavior of running mobs

[Voland]

The other day I was fighting on the Orc hill and I noticed something strange -
orcs run when low on health even when their live friends are still in battle.

From what I remember from EQLIVE and EQMAC (RIP!), mobs never run as long
at least one of their allies is still alive.

Thus, my snaring char (druid/necro) wouldn't have to snare every mob, but
only the last one standing.

So, the running behavior seems to be different on P99... is this intentional?