When casting Raise Dead on a corpse, the following server messages were received:

[CHAT WINDOW TEXT] Warning: Character token not found. [CHAT WINDOW TEXT] Warning: Character token not found.

I get those messages whenever I have a NPC cast a spell actually, I presume it's related to the spell-tracking.

It's related to spell tracking. Since NPCs shouldn't be subject to spell tracking, it is indeed a bug.

Should be fixed.