Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

If you rest with the packhorse in party, the horse vanishes and stablemaster does not offer to find the horse. The horse is simply gone. Where the heck does it go? Should just leave party if the horse doesn't like resting or respawn on the same spot since it hasn't been dismissed. Needs an option to retrieve the least.

Was able to find the horse by switching server, but this is not a good solution and only available if you happen to be somewhere near a server transition.
I'd imagine a reset will fix this as well, but again, does not serve the function of a packhorse.

While not a mechanical solution for the issue at hand, packhorses that disappear due to being dominated when a rest is performed can be recovered by re-logging on the same server. The horse should be at it's last known location.